diff --git a/AIStudio.Wpf.DiagramApp/AIStudio.Wpf.DiagramApp.csproj b/AIStudio.Wpf.DiagramApp/AIStudio.Wpf.DiagramApp.csproj
index a3724a5..dfd930a 100644
--- a/AIStudio.Wpf.DiagramApp/AIStudio.Wpf.DiagramApp.csproj
+++ b/AIStudio.Wpf.DiagramApp/AIStudio.Wpf.DiagramApp.csproj
@@ -109,6 +109,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="AIStudio.Wpf.ColorPicker" Version="1.1.2" />
     <PackageReference Include="AIStudio.Wpf.ComeCapture" Version="1.1.0" />
     <PackageReference Include="Costura.Fody" Version="5.7.0">
       <PrivateAssets>all</PrivateAssets>
diff --git a/AIStudio.Wpf.DiagramApp/ViewModels/MainWindowViewModel.cs b/AIStudio.Wpf.DiagramApp/ViewModels/MainWindowViewModel.cs
index b2821d4..0f1d4f9 100644
--- a/AIStudio.Wpf.DiagramApp/ViewModels/MainWindowViewModel.cs
+++ b/AIStudio.Wpf.DiagramApp/ViewModels/MainWindowViewModel.cs
@@ -727,7 +727,8 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
 
         private void ColorPickerExecuted()
         {
-
+            AIStudio.Wpf.ColorPicker.MainWindow window = new AIStudio.Wpf.ColorPicker.MainWindow();
+            window.Show();
         }
 
         #region 方法
diff --git a/AIStudio.Wpf.DiagramApp/ViewModels/PageViewModel.cs b/AIStudio.Wpf.DiagramApp/ViewModels/PageViewModel.cs
index e23dc91..8ab2384 100644
--- a/AIStudio.Wpf.DiagramApp/ViewModels/PageViewModel.cs
+++ b/AIStudio.Wpf.DiagramApp/ViewModels/PageViewModel.cs
@@ -580,7 +580,7 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
         public void AddImageExecuted(object para)
         {
             ImageItemViewModel itemBase = new ImageItemViewModel();
-            DiagramViewModel?.AddItemCommand.Execute(itemBase);
+            DiagramViewModel?.AddCommand.Execute(itemBase);
             if (itemBase.Root != null)
             {
                 _service.DrawModeViewModel.CursorMode = CursorMode.Move;
@@ -631,7 +631,7 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
         public void AddVideoExectued(object para)
         {
             VideoItemViewModel itemBase = new VideoItemViewModel();
-            DiagramViewModel?.AddItemCommand.Execute(itemBase);
+            DiagramViewModel?.AddCommand.Execute(itemBase);
             if (itemBase.Root != null)
             {
                 _service.DrawModeViewModel.CursorMode = CursorMode.Move;
@@ -641,7 +641,7 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
         public void AddOutLineTextExecuted(object para)
         {
             OutLineTextDesignerItemViewModel itemBase = new OutLineTextDesignerItemViewModel();
-            DiagramViewModel?.AddItemCommand.Execute(itemBase);
+            DiagramViewModel?.AddCommand.Execute(itemBase);
             if (itemBase.Root != null)
             {
                 _service.DrawModeViewModel.CursorMode = CursorMode.Move;
@@ -651,7 +651,7 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
         public void AddBarcodeExecuted(object para)
         {
             BarcodeDesignerItemViewModel itemBase = new BarcodeDesignerItemViewModel() { Format = (BarcodeFormat)Enum.Parse(typeof(BarcodeFormat), para.ToString()), Text = "AIStudio.Wpf.DiagramApp" };
-            DiagramViewModel?.AddItemCommand.Execute(itemBase);
+            DiagramViewModel?.AddCommand.Execute(itemBase);
             if (itemBase.Root != null)
             {
                 _service.DrawModeViewModel.CursorMode = CursorMode.Move;
diff --git a/AIStudio.Wpf.DiagramApp/ViewModels/ToolBoxViewModel.cs b/AIStudio.Wpf.DiagramApp/ViewModels/ToolBoxViewModel.cs
index e061c62..d8d7bb8 100644
--- a/AIStudio.Wpf.DiagramApp/ViewModels/ToolBoxViewModel.cs
+++ b/AIStudio.Wpf.DiagramApp/ViewModels/ToolBoxViewModel.cs
@@ -80,7 +80,7 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
         }
 
         private ICommand _addItemCommand;
-        public ICommand AddItemCommand
+        public ICommand AddCommand
         {
             get
             {
@@ -119,7 +119,9 @@ namespace AIStudio.Wpf.DiagramApp.ViewModels
 
             List<ToolBoxData> defaultToolBoxItems = new List<ToolBoxData>();
             defaultToolBoxItems.Add(new TextToolBoxData("", typeof(DefaultDesignerItemViewModel)));
-
+            var blockitem = new TextToolBoxData("", typeof(BlockDesignerItemViewModel), 64, 32, new Size(130, 65));
+            blockitem.ColorViewModel.FillColor.Color = Color.FromRgb(0x00, 0x2F, 0xA7);
+            defaultToolBoxItems.Add(blockitem);
             ToolBoxCategory.Add(new ToolBoxCategory() { Header = "Default", ToolBoxItems = new ObservableCollection<ToolBoxData>(defaultToolBoxItems), IsExpanded = true });
 
             ToolBoxCategory.Add(new ToolBoxCategory() { Header = "Svg", ToolBoxItems = new ObservableCollection<ToolBoxData>() });
diff --git a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
index ece665e..8e90371 100644
--- a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
+++ b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
@@ -2556,6 +2556,16 @@
                                               Width="190" />
                         </Fluent:Button.ToolTip>
                     </Fluent:Button>
+                    <Fluent:Button Header="取色器" Width="50" VerticalAlignment="Top" Command="{Binding ColorPickerCommand}">
+                        <Fluent:Button.LargeIcon>
+                            <Path  Width="18" Height="18" Stretch="Uniform" Fill="Black" Data="M484.9999999999999 416.5L416.5 485A48.00000000000001 48.00000000000001 0 0 1 350 486.75L300 436.75L267.75 467.75A25 25 0 0 1 232.2500000000001 432.25L263.25 400L125 261.75A50 50 0 0 1 110.75 231.5000000000001L100 127.25A25 25 0 0 1 107.25 107.25A25 25 0 0 1 125 100H127.25L231.5 109.5A50 50 0 0 1 261.75 123.75L401.25 263.25L432.2499999999999 232.25A25 25 0 0 1 467.7499999999998 232.25A25 25 0 0 1 467.7499999999998 267.75L436.7499999999999 298.75L486.7499999999999 348.75A48.00000000000001 48.00000000000001 0 0 1 484.9999999999999 416.5zM160 226.5L300 366L367.25 298.5000000000001L297.5 228.7500000000001"/>
+                        </Fluent:Button.LargeIcon>
+                        <Fluent:Button.ToolTip>
+                            <Fluent:ScreenTip Title="Screen"
+                                              Text="取色器"
+                                              Width="190" />
+                        </Fluent:Button.ToolTip>
+                    </Fluent:Button>
                 </Fluent:RibbonGroupBox>
             </Fluent:RibbonTabItem>
             <Fluent:RibbonTabItem Header="帮助">
diff --git a/AIStudio.Wpf.DiagramApp/Views/ToolBoxControl.xaml b/AIStudio.Wpf.DiagramApp/Views/ToolBoxControl.xaml
index 0c4b359..74ad368 100644
--- a/AIStudio.Wpf.DiagramApp/Views/ToolBoxControl.xaml
+++ b/AIStudio.Wpf.DiagramApp/Views/ToolBoxControl.xaml
@@ -363,7 +363,7 @@
                         <Button Margin="0,5,2,5" ToolTip="导入到我的符号" Command="{Binding DataContext.ImportItemCommand, RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type UserControl}}}" Width="16" Height="16"  Foreground="{DynamicResource BlackBrush}" Background="{DynamicResource WhiteBrush}" BorderBrush="Transparent">
                             <Path Stretch="Fill" Margin="2" Fill="{DynamicResource GrayBrush2}" Data="M14,12L10,8V11H2V13H10V16M20,18V6C20,4.89 19.1,4 18,4H6A2,2 0 0,0 4,6V9H6V6H18V18H6V15H4V18A2,2 0 0,0 6,20H18A2,2 0 0,0 20,18Z" ></Path>
                         </Button>
-                        <Button Margin="0,5,2,5" ToolTip="添加到我的符号" Command="{Binding DataContext.AddItemCommand, RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type UserControl}}}" Width="16" Height="16"  Foreground="{DynamicResource BlackBrush}" Background="{DynamicResource WhiteBrush}" BorderBrush="Transparent">
+                        <Button Margin="0,5,2,5" ToolTip="添加到我的符号" Command="{Binding DataContext.AddCommand, RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type UserControl}}}" Width="16" Height="16"  Foreground="{DynamicResource BlackBrush}" Background="{DynamicResource WhiteBrush}" BorderBrush="Transparent">
                             <Path Stretch="Fill" Margin="2" Fill="{DynamicResource GrayBrush2}" Data="M938.666667 426.666667h-341.333334V85.333333c0-46.933333-38.4-85.333333-85.333333-85.333333s-85.333333 38.4-85.333333 85.333333v341.333334H85.333333c-46.933333 0-85.333333 38.4-85.333333 85.333333s38.4 85.333333 85.333333 85.333333h341.333334v341.333334c0 46.933333 38.4 85.333333 85.333333 85.333333s85.333333-38.4 85.333333-85.333333v-341.333334h341.333334c46.933333 0 85.333333-38.4 85.333333-85.333333s-38.4-85.333333-85.333333-85.333333z" ></Path>
                         </Button>
                         <Button Margin="0,5,5,5" ToolTip="移除" Command="{Binding DataContext.DeleteCommand, RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type UserControl}}}" CommandParameter="{Binding .}" Width="16" Height="16"  Foreground="{DynamicResource BlackBrush}" Background="{DynamicResource WhiteBrush}" BorderBrush="Transparent">
diff --git a/AIStudio.Wpf.DiagramDesigner/Adorners/DrawingRubberbandAdorner.cs b/AIStudio.Wpf.DiagramDesigner/Adorners/DrawingRubberbandAdorner.cs
index b809431..1099136 100644
--- a/AIStudio.Wpf.DiagramDesigner/Adorners/DrawingRubberbandAdorner.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Adorners/DrawingRubberbandAdorner.cs
@@ -189,7 +189,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             if (_drawingDesignerItem?.IsFinish == true)
             {
-                _viewModel.AddItemCommand.Execute(_drawingDesignerItem);
+                _viewModel.AddCommand.Execute(_drawingDesignerItem);
             }
 
             this._service.DrawModeViewModel.ResetDrawMode();
diff --git a/AIStudio.Wpf.DiagramDesigner/Adorners/RubberbandAdorner.cs b/AIStudio.Wpf.DiagramDesigner/Adorners/RubberbandAdorner.cs
index 4c7bb3d..35fffb0 100644
--- a/AIStudio.Wpf.DiagramDesigner/Adorners/RubberbandAdorner.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Adorners/RubberbandAdorner.cs
@@ -90,7 +90,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                         itemBase.ItemWidth = Math.Abs(this.endPoint.Value.X - this.startPoint.Value.X);
                         itemBase.ItemHeight = Math.Abs(this.endPoint.Value.Y - this.startPoint.Value.Y);
 
-                        _viewModel.AddItemCommand.Execute(itemBase);
+                        _viewModel.AddCommand.Execute(itemBase);
                     }
                 }
                 this._service.DrawModeViewModel.ResetDrawMode();
diff --git a/AIStudio.Wpf.DiagramDesigner/Controls/DesignerCanvas.cs b/AIStudio.Wpf.DiagramDesigner/Controls/DesignerCanvas.cs
index ea0c975..6a5067a 100644
--- a/AIStudio.Wpf.DiagramDesigner/Controls/DesignerCanvas.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Controls/DesignerCanvas.cs
@@ -231,9 +231,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         public DesignerCanvas()
         {
             this.Focusable = true;
-            Mediator.Instance.Register(this);
 
-            _service.PropertyChanged += _service_PropertyChanged;
             this.Loaded += DesignerCanvas_Loaded;
             this.IsVisibleChanged += DesignerCanvas_IsVisibleChanged;
         }
@@ -248,7 +246,9 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         private void DesignerCanvas_Loaded(object sender, RoutedEventArgs e)
         {
+            Mediator.Instance.Register(this);
             this.Focus();
+            _service.PropertyChanged += _service_PropertyChanged;
         }
 
         protected override void OnRender(DrawingContext dc)
@@ -394,16 +394,8 @@ namespace AIStudio.Wpf.DiagramDesigner
                         _viewModel.ClearSelectedItems();
 
                     }
-
-                    if (_service.DrawModeViewModel.LineDrawModeSelected)//画线模式,可以不命中实体
-                    {
-                        if (SourceConnector == null)
-                        {
-                            //新建一个Part连接点
-                            SourceConnector = new Connector() { Content = new PartCreatedConnectorInfo(currentPoint.X, currentPoint.Y), Tag = "虚拟的连接点" };
-                        }
-                    }
-                    else if (_service.DrawModeViewModel.SharpDrawModeSelected || 
+                 
+                    if (_service.DrawModeViewModel.SharpDrawModeSelected || 
                         (_service.DrawModeViewModel.DrawingDrawModeSelected && _service.DrawModeViewModel.DrawingDrawMode != DrawMode.Select))
                     {
                         // create rubberband adorner
@@ -417,7 +409,14 @@ namespace AIStudio.Wpf.DiagramDesigner
                             }
                         }
                     }
-
+                    else if (_service.DrawModeViewModel.LineDrawModeSelected)//画线模式,可以不命中实体
+                    {
+                        if (SourceConnector == null)
+                        {
+                            //新建一个Part连接点
+                            SourceConnector = new Connector() { Content = new PartCreatedConnectorInfo(currentPoint.X, currentPoint.Y), Tag = "虚拟的连接点" };
+                        }
+                    }
                     e.Handled = true;
                 }
             }
@@ -511,8 +510,8 @@ namespace AIStudio.Wpf.DiagramDesigner
                 {
                     ConnectorInfoBase sinkDataItem = SinkConnector.Info;
 
-                    _viewModel.Remove(partialConnection);
-                    _viewModel.AddItemCommand.Execute(new ConnectionViewModel(_viewModel, sourceDataItem, sinkDataItem, LineDrawMode, RouterMode));
+                    _viewModel.Delete(partialConnection);
+                    _viewModel.AddCommand.Execute(new ConnectionViewModel(_viewModel, sourceDataItem, sinkDataItem, LineDrawMode, RouterMode));
                 }
                 else if (partialConnection.IsFullConnection)//自动连接模式
                 {
@@ -523,13 +522,13 @@ namespace AIStudio.Wpf.DiagramDesigner
                     Point currentPoint = e.GetPosition(this);
                     ConnectorInfoBase sinkDataItem = new PartCreatedConnectorInfo(currentPoint.X, currentPoint.Y);
 
-                    _viewModel.Remove(partialConnection);
-                    _viewModel.AddItemCommand.Execute(new ConnectionViewModel(_viewModel, sourceDataItem, sinkDataItem, LineDrawMode, RouterMode));
+                    _viewModel.Delete(partialConnection);
+                    _viewModel.AddCommand.Execute(new ConnectionViewModel(_viewModel, sourceDataItem, sinkDataItem, LineDrawMode, RouterMode));
                 }
                 else
                 {
                     //Need to remove last item as we did not finish drawing the path
-                    _viewModel.Remove(partialConnection);
+                    _viewModel.Delete(partialConnection);
                 }
             }
 
@@ -635,7 +634,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                         item.Left += position.X - itemswidth / 2;
                         item.Top += position.Y - itemsheight / 2;
                     }
-                    _viewModel.AddItemCommand.Execute(designerItems);
+                    _viewModel.AddCommand.Execute(designerItems);
                 }
                 else
                 {
@@ -657,7 +656,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                     }
                     itemBase.Left = Math.Max(0, position.X - itemBase.ItemWidth / 2);
                     itemBase.Top = Math.Max(0, position.Y - itemBase.ItemHeight / 2);
-                    _viewModel.AddItemCommand.Execute(itemBase);
+                    _viewModel.AddCommand.Execute(itemBase);
                 }
             }
             var dragFile = e.Data.GetData(DataFormats.FileDrop);
@@ -675,7 +674,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
                     itemBase.Left = Math.Max(0, position.X - itemBase.ItemWidth / 2);
                     itemBase.Top = Math.Max(0, position.Y - itemBase.ItemHeight / 2);
-                    _viewModel.AddItemCommand.Execute(itemBase);
+                    _viewModel.AddCommand.Execute(itemBase);
                 }
             }
             e.Handled = true;
diff --git a/AIStudio.Wpf.DiagramDesigner/Controls/DragThumb.cs b/AIStudio.Wpf.DiagramDesigner/Controls/DragThumb.cs
index 2e9fcf5..a5a563c 100644
--- a/AIStudio.Wpf.DiagramDesigner/Controls/DragThumb.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Controls/DragThumb.cs
@@ -96,9 +96,53 @@ namespace AIStudio.Wpf.DiagramDesigner.Controls
                     item.SetCellAlignment();
                 }
 
+                var blocks = designerItems.OfType<BlockDesignerItemViewModel>().ToList();
+                if (blocks.Any())
+                {
+                    foreach (BlockDesignerItemViewModel item in blocks)
+                    {
+                        var portTuple = DiagramViewModel.FindNearPortToAttachTo(item, true);
+                        var portParent = portTuple.Item1;
+                        var portNext = portTuple.Item2;
+
+                        if (portParent != null)
+                        {
+                            (portParent.DataItem as BlockDesignerItemViewModel).AddNext(item);
+                            portParent.BeAttachTo = false;
+                            portParent.DisableAttachTo = false;
+                        }
+                        else
+                        {
+                            if (item.Parent != null)
+                            {
+                                (item.Parent as BlockDesignerItemViewModel).Next = null;
+                                item.Parent = null;
+                                item.ParentId = new Guid();
+                            }
+                        }
+
+                        if (portNext != null)
+                        {
+                            item.AddNext(portNext.DataItem as BlockDesignerItemViewModel);
+                            portNext.BeAttachTo = false;
+                            portNext.DisableAttachTo = false;
+                        }
+                        else
+                        {
+                            if (item.Next != null)
+                            {
+                                item.Next.Parent = null;
+                                item.Next.ParentId = new Guid();
+                                item.Next = null;
+                            }
+                        }
+                    }
+                    //-DiagramViewModel.ClearNearPort();
+                }
+
                 Dictionary<DesignerItemViewModelBase, Tuple<PointBase, PointBase>> infos =
-                    designerItems.OfType<DesignerItemViewModelBase>().ToDictionary(p => p,
-                    p => new Tuple<PointBase, PointBase>(p.GetOldValue<PointBase>(nameof(p.TopLeft)), p.TopLeft));
+                designerItems.OfType<DesignerItemViewModelBase>().ToDictionary(p => p,
+                p => new Tuple<PointBase, PointBase>(p.GetOldValue<PointBase>(nameof(p.TopLeft)), p.TopLeft));
 
                 //部分连接点可以移动
                 Dictionary<ConnectionViewModel, Tuple<Tuple<PointBase?, PointBase?>, Tuple<PointBase?, PointBase?>>> conncetorinfos =
@@ -162,6 +206,15 @@ namespace AIStudio.Wpf.DiagramDesigner.Controls
                     item.SetPartPostion(sourcePoint, sinkPoint);
                 }
 
+                var blocks = designerItems.OfType<BlockDesignerItemViewModel>().ToList();
+                if (blocks.Any())
+                {
+                    DiagramViewModel.ClearNearPort();
+                    foreach (BlockDesignerItemViewModel item in blocks)
+                    {
+                        DiagramViewModel.FindNearPortToAttachTo(item, false);
+                    }
+                }
                 e.Handled = true;
             }
         }
diff --git a/AIStudio.Wpf.DiagramDesigner/Helpers/PointHelper.cs b/AIStudio.Wpf.DiagramDesigner/Helpers/PointHelper.cs
index a104f9e..c9645c3 100644
--- a/AIStudio.Wpf.DiagramDesigner/Helpers/PointHelper.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Helpers/PointHelper.cs
@@ -13,10 +13,17 @@ namespace AIStudio.Wpf.DiagramDesigner
                 return point;
             }
 
+            var connectorWidth =  double.IsNaN(connector.ConnectorWidth) ? 0 : connector.ConnectorWidth;
+            var connectorHeight = double.IsNaN(connector.ConnectorHeight) ? 0 : connector.ConnectorHeight;
+            var left = connector.DataItem.Left;
+            var top = connector.DataItem.Top;
+            var itemWidth = connector.DataItem.ItemWidth;
+            var itemHeight = connector.DataItem.ItemHeight;
+
             if (connector.IsInnerPoint)
             {
-                point = new PointBase(connector.DataItem.Left + connector.DataItem.ItemWidth * connector.XRatio - connector.ConnectorWidth / 2,
-                        connector.DataItem.Top + connector.DataItem.ItemHeight * connector.YRatio - connector.ConnectorHeight / 2);
+                point = new PointBase(left + itemWidth * connector.XRatio - connectorWidth / 2,
+                        top + itemHeight * connector.YRatio - connectorHeight / 2);
             }
             else if (connector.IsPortless)
             {
@@ -27,39 +34,39 @@ namespace AIStudio.Wpf.DiagramDesigner
                 switch (connector.Orientation)
                 {
                     case ConnectorOrientation.Left:
-                        point = new PointBase(connector.DataItem.Left - connector.ConnectorWidth / 2, connector.DataItem.Top + (connector.DataItem.ItemHeight / 2) - connector.ConnectorHeight / 2);
+                        point = new PointBase(left - connectorWidth / 2, top + (itemHeight / 2) - connectorHeight / 2);
                         break;
                     case ConnectorOrientation.TopLeft:
-                        point = new PointBase(connector.DataItem.Left - connector.ConnectorWidth / 2, connector.DataItem.Top - connector.ConnectorHeight / 2);
+                        point = new PointBase(left - connectorWidth / 2, top - connectorHeight / 2);
                         break;
                     case ConnectorOrientation.Top:
-                        point = new PointBase(connector.DataItem.Left + (connector.DataItem.ItemWidth / 2) - connector.ConnectorWidth / 2, connector.DataItem.Top - connector.ConnectorHeight / 2);
+                        point = new PointBase(left + (itemWidth / 2) - connectorWidth / 2, top - connectorHeight / 2);
                         break;
                     case ConnectorOrientation.TopRight:
-                        point = new PointBase(connector.DataItem.Left + connector.DataItem.ItemWidth - connector.ConnectorWidth / 2, connector.DataItem.Top - connector.ConnectorHeight / 2);
+                        point = new PointBase(left + itemWidth - connectorWidth / 2, top - connectorHeight / 2);
                         break;
                     case ConnectorOrientation.Right:
-                        point = new PointBase(connector.DataItem.Left + connector.DataItem.ItemWidth - connector.ConnectorWidth / 2, connector.DataItem.Top + (connector.DataItem.ItemHeight / 2) - connector.ConnectorHeight / 2);
+                        point = new PointBase(left + itemWidth - connectorWidth / 2, top + (itemHeight / 2) - connectorHeight / 2);
                         break;
                     case ConnectorOrientation.BottomRight:
-                        point = new PointBase(connector.DataItem.Left + connector.DataItem.ItemWidth - connector.ConnectorWidth / 2, connector.DataItem.Top + connector.DataItem.ItemHeight - connector.ConnectorHeight / 2);
+                        point = new PointBase(left + itemWidth - connectorWidth / 2, top + itemHeight - connectorHeight / 2);
                         break;
                     case ConnectorOrientation.Bottom:
-                        point = new PointBase(connector.DataItem.Left + (connector.DataItem.ItemWidth / 2) - connector.ConnectorWidth / 2, connector.DataItem.Top + connector.DataItem.ItemHeight - connector.ConnectorHeight / 2);
+                        point = new PointBase(left + (itemWidth / 2) - connectorWidth / 2, top + itemHeight - connectorHeight / 2);
                         break;
                     case ConnectorOrientation.BottomLeft:
-                        point = new PointBase(connector.DataItem.Left - connector.ConnectorWidth / 2, connector.DataItem.Top + connector.DataItem.ItemHeight - connector.ConnectorHeight / 2);
+                        point = new PointBase(left - connectorWidth / 2, top + itemHeight - connectorHeight / 2);
                         break;
                     default:
-                        point = new PointBase(connector.DataItem.Left + (connector.DataItem.ItemWidth / 2) - connector.ConnectorWidth / 2, connector.DataItem.Top + (connector.DataItem.ItemHeight / 2) - connector.ConnectorHeight / 2);
+                        point = new PointBase(left + (itemWidth / 2) - connectorWidth / 2, top + (itemHeight / 2) - connectorHeight / 2);
                         break;
                 }
             }
 
             if (middle)
             {
-                point.X = point.X + connector.ConnectorWidth / 2;
-                point.Y = point.Y + connector.ConnectorHeight / 2;
+                point.X = point.X + connectorWidth / 2;
+                point.Y = point.Y + connectorHeight / 2;
             }
             //旋转后的坐标
             var newX = (point.X - connector.DataItem.MiddlePosition.X) * Math.Cos(connector.DataItem.Angle * Math.PI / 180) - (point.Y - connector.DataItem.MiddlePosition.Y) * Math.Sin(connector.DataItem.Angle * Math.PI / 180) + connector.DataItem.MiddlePosition.X;
diff --git a/AIStudio.Wpf.DiagramDesigner/StyleSelectors/DesignerItemsControlItemStyleSelector.cs b/AIStudio.Wpf.DiagramDesigner/StyleSelectors/DesignerItemsControlItemStyleSelector.cs
index b6f8eed..3867a5f 100644
--- a/AIStudio.Wpf.DiagramDesigner/StyleSelectors/DesignerItemsControlItemStyleSelector.cs
+++ b/AIStudio.Wpf.DiagramDesigner/StyleSelectors/DesignerItemsControlItemStyleSelector.cs
@@ -37,6 +37,11 @@ namespace AIStudio.Wpf.DiagramDesigner
                 return (Style)itemsControl.FindResource("logicalItemStyle");
             }
 
+            if (item is BlockDesignerItemViewModel)
+            {
+                return (Style)itemsControl.FindResource("blockItemStyle");
+            }
+
             if (item is DesignerItemViewModelBase)
             {
                 return (Style)itemsControl.FindResource("designerItemStyle");
diff --git a/AIStudio.Wpf.DiagramDesigner/Themes/ConnectorItem.xaml b/AIStudio.Wpf.DiagramDesigner/Themes/ConnectorItem.xaml
index 2a5dad9..6b5a4ac 100644
--- a/AIStudio.Wpf.DiagramDesigner/Themes/ConnectorItem.xaml
+++ b/AIStudio.Wpf.DiagramDesigner/Themes/ConnectorItem.xaml
@@ -142,6 +142,22 @@
         </DataTemplate.Triggers>
     </DataTemplate>
 
+    <DataTemplate DataType="{x:Type dd:BlockConnectorInfo}">
+        <Grid Width="{Binding ConnectorWidth}" Height="{Binding ConnectorHeight}" >
+            <Rectangle x:Name="innter" Fill="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}" StrokeThickness="1" Stroke="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" />
+        </Grid>
+        <DataTemplate.Triggers>
+            <DataTrigger Binding="{Binding BeAttachTo}" Value="True">
+                <Setter TargetName="innter" Property="Fill" Value="#f73438" />
+                <Setter TargetName="innter" Property="Stroke" Value="#f73438" />
+            </DataTrigger>
+            <DataTrigger Binding="{Binding DisableAttachTo}" Value="True">
+                <Setter TargetName="innter" Property="Fill" Value="Gray" />
+                <Setter TargetName="innter" Property="Stroke" Value="Gray" />
+            </DataTrigger>
+        </DataTemplate.Triggers>
+    </DataTemplate>
+
     <!-- DragThumb Default Template -->
     <Style TargetType="{x:Type c:DragThumb}">
         <Setter Property="Template">
diff --git a/AIStudio.Wpf.DiagramDesigner/Themes/DesignerItem.xaml b/AIStudio.Wpf.DiagramDesigner/Themes/DesignerItem.xaml
index 68be7ba..c314b4e 100644
--- a/AIStudio.Wpf.DiagramDesigner/Themes/DesignerItem.xaml
+++ b/AIStudio.Wpf.DiagramDesigner/Themes/DesignerItem.xaml
@@ -97,6 +97,18 @@
         </Grid>
     </DataTemplate>
 
+    <DataTemplate DataType="{x:Type dd:BlockDesignerItemViewModel}">
+        <Grid IsHitTestVisible="False">
+            <Rectangle StrokeThickness="1" Fill="{Binding ColorViewModel.FillColor,Converter={StaticResource ColorBrushConverter}}" Stroke="{Binding ColorViewModel.LineColor,Converter={StaticResource ColorBrushConverter}}" />
+            <Border x:Name="left" HorizontalAlignment="Left" Width="5" Background="Transparent"/>
+        </Grid>
+        <DataTemplate.Triggers>
+            <DataTrigger Binding="{Binding IsSelected}" Value="true">
+                <Setter TargetName="left" Property="Background" Value="#3399FF"/>
+            </DataTrigger>
+        </DataTemplate.Triggers>
+    </DataTemplate>
+
     <DataTemplate DataType="{x:Type dd:ImageItemViewModel}">
         <Grid ToolTip="{Binding Icon}">
             <Grid IsHitTestVisible="False" ClipToBounds="True">
diff --git a/AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml b/AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml
index b7726cc..c52ec44 100644
--- a/AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml
+++ b/AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml
@@ -217,7 +217,7 @@
                                 </Border>
                                 <Rectangle Fill="#7F243859" Opacity="0.5" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Visibility="{Binding ShouldInsertAnchor, Converter={StaticResource BooleanToVisibilityConverter}}">
                                     <i:Interaction.Behaviors>
-                                        <dd:ControlMouseLeftButtonDownCommandBehavior Command="{Binding AddItemCommand}" />
+                                        <dd:ControlMouseLeftButtonDownCommandBehavior Command="{Binding AddCommand}" />
                                     </i:Interaction.Behaviors>
                                 </Rectangle>
                             </Grid>
@@ -341,6 +341,36 @@
                 </dd:ConnectorContainer>
             </ControlTemplate>
 
+            <ControlTemplate x:Key="BlockConnectorDecoratorTemplate"
+                     TargetType="{x:Type Control}">
+                <Grid Margin="{Binding ConnectorMargin}">
+                    <dd:Connector 
+                        Content="{Binding LeftConnector}" 
+                        SnapsToDevicePixels="True"
+                        Orientation="Left"
+                        VerticalAlignment="Stretch"
+                        HorizontalAlignment="Left"/>
+                    <dd:Connector 
+                        Content="{Binding TopConnector}"
+                        SnapsToDevicePixels="True"
+                        Orientation="Top"
+                        VerticalAlignment="Top"
+                        HorizontalAlignment="Stretch"/>
+                    <dd:Connector 
+                        Content="{Binding RightConnector}"
+                        SnapsToDevicePixels="True"
+                        Orientation="Right"
+                        VerticalAlignment="Stretch"
+                        HorizontalAlignment="Right"/>
+                    <dd:Connector 
+                        Content="{Binding BottomConnector}"
+                        SnapsToDevicePixels="True"
+                        Orientation="Bottom"
+                        VerticalAlignment="Bottom"
+                        HorizontalAlignment="Stretch"/>                   
+                </Grid>
+            </ControlTemplate>
+
             <!--基础类型-->
             <Style x:Key="designerItemStyle"
                                 TargetType="{x:Type ContentPresenter}">
@@ -773,6 +803,92 @@
                     </Setter.Value>
                 </Setter>
             </Style>
+
+            <!--自带的block基础类型-->
+            <Style x:Key="blockItemStyle"
+                                TargetType="{x:Type ContentPresenter}">
+                <Setter Property="Canvas.Left"
+                                    Value="{Binding Left}" />
+                <Setter Property="Canvas.Top"
+                                    Value="{Binding Top}" />
+                <Setter Property="Canvas.ZIndex"
+                                    Value="{Binding ZIndex}" />
+                <Setter Property="dd:SelectionProps.EnabledForSelection"
+                                    Value="{Binding EnabledForSelection}" />
+                <Setter Property="Visibility"
+                                    Value="{Binding Visible,Converter={StaticResource BooleanToVisibilityConverter}}"/>
+                <Setter Property="Width"
+                                    Value="{Binding ItemWidth}" />
+                <Setter Property="Height"
+                                    Value="{Binding ItemHeight}" />
+                <Setter Property="MinWidth"
+                                    Value="{Binding MinItemWidth}" />
+                <Setter Property="MinHeight"
+                                    Value="{Binding MinItemHeight}" />
+                <Setter Property="SnapsToDevicePixels"
+                                    Value="True" />
+                <Setter Property="ContentTemplate">
+                    <Setter.Value>
+                        <DataTemplate>
+                            <Grid x:Name="selectedGrid" IsHitTestVisible="{Binding IsHitTestVisible}" >
+                                <Grid.ContextMenu>
+                                    <ContextMenu ItemsSource="{Binding MenuOptions}" Visibility="{Binding ShowMenuOptions,Converter={StaticResource BooleanToVisibilityConverter}}">
+                                        <ContextMenu.ItemContainerStyle>
+                                            <Style TargetType="MenuItem">
+                                                <Setter Property="MenuItem.Header" Value="{Binding Text}" />
+                                                <Setter Property="MenuItem.ItemsSource" Value="{Binding Children}" />
+                                                <Setter Property="MenuItem.Command" Value="{Binding Command}" />
+                                                <Setter Property="MenuItem.Icon" Value="{Binding Icon}" />
+                                                <Setter Property="CommandParameter" Value="{Binding CommandParameter}" />
+                                                <Setter Property="MenuItem.IsCheckable" Value="{Binding IsCheckable}" />
+                                                <Setter Property="MenuItem.IsChecked" Value="{Binding IsChecked}" />
+                                            </Style>
+                                        </ContextMenu.ItemContainerStyle>
+                                    </ContextMenu>
+                                </Grid.ContextMenu>
+
+                                <!-- PART_DragThumb -->
+                                <c:DragThumb x:Name="PART_DragThumb" 
+                                                            Cursor="SizeAll" >
+                                    <c:DragThumb.InputBindings>
+                                        <MouseBinding MouseAction="LeftDoubleClick" Command="{Binding EditCommand}" CommandParameter="{Binding }" />
+                                    </c:DragThumb.InputBindings>
+                                </c:DragThumb>
+
+                                <Grid RenderTransformOrigin="0.5,0.5" >
+
+                                    <!-- PART_ContentPresenter -->
+                                    <ContentPresenter x:Name="PART_ContentPresenter"
+                                                                HorizontalAlignment="Stretch"
+                                                                VerticalAlignment="Stretch"
+                                                                Content="{TemplateBinding Content}" />
+
+                                    <TextBlock x:Name="PART_Text" Text="{Binding Text}" IsHitTestVisible="False"/>
+
+                                    <!-- PART_ConnectorDecorator -->
+                                    <Control x:Name="PART_ConnectorDecorator" Template="{StaticResource BlockConnectorDecoratorTemplate}"/>
+
+                                </Grid>
+                            </Grid>
+                            <DataTemplate.Triggers>
+                                <DataTrigger Binding="{Binding Connectors.Count}" Value="0">
+                                    <Setter TargetName="PART_ConnectorDecorator" Property="Visibility" Value="Collapsed" />
+                                </DataTrigger>
+                            </DataTemplate.Triggers>
+                        </DataTemplate>
+                    </Setter.Value>
+                </Setter>
+                <Setter Property="Effect">
+                    <Setter.Value>
+                        <DropShadowEffect BlurRadius="10" Color="{Binding ColorViewModel.ShadowColor}"/>
+                    </Setter.Value>
+                </Setter>
+                <Style.Triggers>
+                    <DataTrigger Binding="{Binding ColorViewModel.ShadowColor}" Value="Transparent">
+                        <Setter Property="Effect" Value="{x:Null}"/>
+                    </DataTrigger>
+                </Style.Triggers>
+            </Style>
         </ResourceDictionary>
     </UserControl.Resources>
     <Grid>
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs
index 7e20d28..c7dbeab 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/ConnectionViewModel.cs
@@ -738,7 +738,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             if (this.Root is IDiagramViewModel)
             {
                 var diagramVM = this.Root as IDiagramViewModel;
-                diagramVM.RemoveItemCommand.Execute(this);
+                diagramVM.DeleteCommand.Execute(this);
             }
         }
 
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/BlockConnectorInfo.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/BlockConnectorInfo.cs
new file mode 100644
index 0000000..2ca0484
--- /dev/null
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/BlockConnectorInfo.cs
@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+using AIStudio.Wpf.DiagramDesigner.Models;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public class BlockConnectorInfo : FullyCreatedConnectorInfo
+    {
+        public BlockConnectorInfo(DesignerItemViewModelBase dataItem, ConnectorOrientation orientation) : this(null, dataItem, orientation)
+        {
+
+        }
+
+        public BlockConnectorInfo(IDiagramViewModel root, DesignerItemViewModelBase dataItem, ConnectorOrientation orientation) : base(root, dataItem, orientation)
+        {
+            if (Orientation == ConnectorOrientation.Left || Orientation == ConnectorOrientation.Right)
+            {
+                ConnectorWidth = 4;
+                ConnectorHeight = double.NaN;
+            }
+            else if (Orientation == ConnectorOrientation.Top || Orientation == ConnectorOrientation.Bottom)
+            {
+                ConnectorWidth = double.NaN;
+                ConnectorHeight = 4;
+            }
+        } 
+
+        public BlockConnectorInfo(IDiagramViewModel root, DesignerItemViewModelBase dataItem, SerializableItem serializableItem, string serializableType) : base(root, dataItem, serializableItem, serializableType)
+        {
+        }
+
+        public BlockConnectorInfo(IDiagramViewModel root, DesignerItemViewModelBase dataItem, SelectableItemBase designer) : base(root, dataItem, designer)
+        {
+        }
+
+        protected override void InitNew()
+        {
+            base.InitNew();
+            ColorViewModel.LineColor.Color = Colors.Transparent;
+            ColorViewModel.FillColor.Color = Colors.Transparent;
+        }
+    }
+}
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs
index e924c73..5637f32 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DesignerItemViewModelBase.cs
@@ -78,7 +78,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return connectors?.FirstOrDefault();
+                return Connectors?.FirstOrDefault();
             }
         }
 
@@ -86,7 +86,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.Top);
+                return Connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.Top);
             }
         }
 
@@ -94,7 +94,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.Bottom);
+                return Connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.Bottom);
             }
         }
 
@@ -102,7 +102,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.Left);
+                return Connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.Left);
             }
         }
 
@@ -110,7 +110,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.Right);
+                return Connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.Right);
             }
         }
 
@@ -118,7 +118,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.TopLeft);
+                return Connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.TopLeft);
             }
         }
 
@@ -126,7 +126,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.TopRight);
+                return Connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.TopRight);
             }
         }
 
@@ -134,7 +134,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.BottomLeft);
+                return Connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.BottomLeft);
             }
         }
 
@@ -142,7 +142,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get
             {
-                return connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.BottomRight);
+                return Connectors?.FirstOrDefault(p => p.Orientation == ConnectorOrientation.BottomRight);
             }
         }
 
@@ -294,7 +294,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 if (SetProperty(ref _showConnectors, value))
                 {
-                    foreach (var connector in connectors)
+                    foreach (var connector in Connectors)
                     {
                         connector.ShowConnectors = value;
                     }
@@ -566,7 +566,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
 
         protected ObservableCollection<FullyCreatedConnectorInfo> connectors = new ObservableCollection<FullyCreatedConnectorInfo>();
-        public IEnumerable<FullyCreatedConnectorInfo> Connectors
+        public ObservableCollection<FullyCreatedConnectorInfo> Connectors
         {
             get
             {
@@ -600,8 +600,8 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 return Observable
                     .FromEventPattern<NotifyCollectionChangedEventHandler, NotifyCollectionChangedEventArgs>(
-                        h => this.connectors.CollectionChanged += h,
-                        h => this.connectors.CollectionChanged -= h)
+                        h => this.Connectors.CollectionChanged += h,
+                        h => this.Connectors.CollectionChanged -= h)
                     .Select(x => x.EventArgs);
             }
         }
@@ -611,24 +611,24 @@ namespace AIStudio.Wpf.DiagramDesigner
         #region 方法
         public void AddConnector(FullyCreatedConnectorInfo connector)
         {
-            if (!connectors.Contains(connector))
+            if (!Connectors.Contains(connector))
             {
-                connectors.Add(connector);
+                Connectors.Add(connector);
                 ConnectorMargin = 0 - connector.ConnectorWidth / 2;
             }
         }
 
         public void RemoveConnector(FullyCreatedConnectorInfo connector)
         {
-            if (connectors.Contains(connector))
+            if (Connectors.Contains(connector))
             {
-                connectors.Remove(connector);
+                Connectors.Remove(connector);
             }
         }
 
         public virtual void ClearConnectors()
         {
-            connectors.Clear();
+            Connectors.Clear();
         }
 
         public void SetCellAlignment()
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
index e8b1fd5..76bdf0e 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
@@ -204,7 +204,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        
+
 
         private bool _isEditName;
         [Browsable(false)]
@@ -373,24 +373,6 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        private ICommand _addItemCommand;
-        public ICommand AddItemCommand
-        {
-            get
-            {
-                return this._addItemCommand ?? (this._addItemCommand = new SimpleCommand(ExecuteEnable, ExecuteAddItemCommand));
-            }
-        }
-
-        private ICommand _removeItemCommand;
-        public ICommand RemoveItemCommand
-        {
-            get
-            {
-                return this._removeItemCommand ?? (this._removeItemCommand = new SimpleCommand(ExecuteEnable, ExecuteRemoveItemCommand));
-            }
-        }
-
         private ICommand _clearSelectedItemsCommand;
         public ICommand ClearSelectedItemsCommand
         {
@@ -544,6 +526,24 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
+        private ICommand _addCommand;
+        public ICommand AddCommand
+        {
+            get
+            {
+                return this._addCommand ?? (this._addCommand = new SimpleCommand(ExecuteEnable, ExecuteAddCommand));
+            }
+        }
+
+        private ICommand _deleteCommand;
+        public virtual ICommand DeleteCommand
+        {
+            get
+            {
+                return this._deleteCommand ?? (this._deleteCommand = new SimpleCommand(ExecuteEnable, ExecuteDeleteCommand));
+            }
+        }
+
         private ICommand _copyCommand;
         public ICommand CopyCommand
         {
@@ -571,15 +571,6 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        private ICommand _deleteCommand;
-        public virtual ICommand DeleteCommand
-        {
-            get
-            {
-                return this._deleteCommand ?? (this._deleteCommand = new SimpleCommand(ExecuteEnable, ExecuteDeleteCommand));
-            }
-        }
-
         private ICommand _leftMoveCommand;
         public ICommand LeftMoveCommand
         {
@@ -1004,143 +995,13 @@ namespace AIStudio.Wpf.DiagramDesigner
             var items = this.Items.ToList();
             DoCommandManager.DoNewCommand(this.ToString(),
              () => {
-                 this.Items.Clear();
+                 Delete(items);
              },
              () => {
-                 foreach (var item in items)
-                 {
-                     Add(item);
-                 }
+                 Add(items);
              });
         }
 
-        private void ExecuteAddItemCommand(object parameter)
-        {
-            List<SelectableDesignerItemViewModelBase> newitems = new List<SelectableDesignerItemViewModelBase>();
-            if (parameter is SelectableDesignerItemViewModelBase ite)
-            {
-                newitems.Add(ite);
-            }
-            else if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> items)
-            {
-                newitems.AddRange(items);
-            }
-
-            DoCommandManager.DoNewCommand(this.ToString(),
-            () => {
-                ClearSelectedItems();
-                Add(newitems, true);
-            },
-            () => {
-                foreach (var item in newitems)
-                {
-                    Items.Remove(item);
-                }
-            });
-        }
-
-        public bool AddVerify(SelectableDesignerItemViewModelBase item)
-        {
-            if (item.Verify() == false)
-                return false;
-
-            return true;
-        }
-
-        //使用程序添加对象，比如Demo初始化
-        public void Add(object parameter, bool? isSelected = false)
-        {
-            if (parameter is SelectableDesignerItemViewModelBase ite)
-            {
-                if (AddVerify(ite) != true) return;
-
-                Add(ite, isSelected);
-            }
-            else if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> items)
-            {
-                if (items.Select(p => AddVerify(p)).Any() != true) return;
-
-                foreach (var item in items)
-                {
-                    Add(item, isSelected);
-                }
-            }
-        }
-
-        private void Add(SelectableDesignerItemViewModelBase item, bool? isSelected = true)
-        {
-            item.Root = this;
-            item.ZIndex = Items.Any() ? Items.Max(p => p.ZIndex) + 1 : 0;
-            if (item.Id == Guid.Empty)
-            {
-                item.Id = Guid.NewGuid();
-            }
-
-            var logical = item as LogicalGateItemViewModelBase;
-            if (logical != null)
-            {
-                logical.OrderNumber = Items.OfType<LogicalGateItemViewModelBase>().Count() + 1;
-            }
-
-            var designerItemViewModelBase = item as DesignerItemViewModelBase;
-            if (designerItemViewModelBase != null)
-            {
-                designerItemViewModelBase.SetCellAlignment();
-            }
-            Items.Add(item);
-            if (isSelected != null)
-            {
-                item.IsSelected = isSelected.Value;
-            }
-        }
-
-        public void Remove(object parameter)
-        {
-            if (parameter is SelectableDesignerItemViewModelBase ite)
-            {
-                ite.IsSelected = false;
-                ite.Dispose();
-                Items.Remove(ite);
-            }
-            else if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> items)
-            {
-                foreach (var item in items)
-                {
-                    item.IsSelected = false;
-                    item.Dispose();
-                    Items.Remove(item);
-                }
-            }
-        }
-
-        private void ExecuteRemoveItemCommand(object parameter)
-        {
-            List<SelectableDesignerItemViewModelBase> olditems = new List<SelectableDesignerItemViewModelBase>();
-            if (parameter is SelectableDesignerItemViewModelBase node)
-            {
-                olditems.Add(node);
-            }
-            else if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> para)
-            {
-                olditems.AddRange(para);
-            }
-            else
-            {
-                olditems.AddRange(SelectedItems);
-            }
-
-            if (olditems.Any())
-            {
-                DoCommandManager.DoNewCommand(this.ToString(),
-                   () => {
-                       Remove(olditems);
-                   },
-                   () => {
-                       Add(olditems);
-                   });
-            }
-        }
-
         private void ExecuteClearSelectedItemsCommand(object parameter)
         {
             List<SelectableDesignerItemViewModelBase> selectedItems = new List<SelectableDesignerItemViewModelBase>();
@@ -1187,7 +1048,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         public virtual void ExecuteNextCommand(object parameter)
         {
-        
+
         }
 
         private void ExecuteSelectAllCommand(object parameter)
@@ -1284,7 +1145,84 @@ namespace AIStudio.Wpf.DiagramDesigner
         }
         #endregion
 
-        #region 复制,粘贴
+        #region 新增,删除 复制,粘贴
+        private void ExecuteAddCommand(object parameter)
+        {
+            List<SelectableDesignerItemViewModelBase> newitems = new List<SelectableDesignerItemViewModelBase>();
+            if (parameter is SelectableDesignerItemViewModelBase ite)
+            {
+                newitems.Add(ite);
+            }
+            else if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> items)
+            {
+                newitems.AddRange(items);
+            }
+
+            DoCommandManager.DoNewCommand(this.ToString(),
+            () => {
+                ClearSelectedItems();
+                Add(newitems, true);
+            },
+            () => {
+                Delete(newitems);
+            });
+        }
+
+        public bool AddVerify(SelectableDesignerItemViewModelBase item)
+        {
+            if (item.Verify() == false)
+                return false;
+
+            return true;
+        }
+
+        //使用程序添加对象，比如Demo初始化
+        public void Add(object parameter, bool? isSelected = false)
+        {
+            if (parameter is SelectableDesignerItemViewModelBase ite)
+            {
+                if (AddVerify(ite) != true) return;
+
+                Add(ite, isSelected);
+            }
+            else if (parameter is IEnumerable<SelectableDesignerItemViewModelBase> items)
+            {
+                if (items.Select(p => AddVerify(p)).Any() != true) return;
+
+                foreach (var item in items)
+                {
+                    Add(item, isSelected);
+                }
+            }
+        }
+
+        private void Add(SelectableDesignerItemViewModelBase item, bool? isSelected = true)
+        {
+            item.Root = this;
+            item.ZIndex = Items.Any() ? Items.Max(p => p.ZIndex) + 1 : 0;
+            if (item.Id == Guid.Empty)
+            {
+                item.Id = Guid.NewGuid();
+            }
+
+            var logical = item as LogicalGateItemViewModelBase;
+            if (logical != null)
+            {
+                logical.OrderNumber = Items.OfType<LogicalGateItemViewModelBase>().Count() + 1;
+            }
+
+            var designerItemViewModelBase = item as DesignerItemViewModelBase;
+            if (designerItemViewModelBase != null)
+            {
+                designerItemViewModelBase.SetCellAlignment();
+            }
+            Items.Add(item);
+            if (isSelected != null)
+            {
+                item.IsSelected = isSelected.Value;
+            }
+        }
+
         private void ExecuteCopyCommand(object parameter)
         {
             Copy(parameter);
@@ -1436,10 +1374,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                                FixOtherInfo(items);
                            },
                            () => {
-                               foreach (var item in items)
-                               {
-                                   Items.Remove(item);
-                               }
+                               Delete(items);
                            });
                     }
                 }
@@ -1484,16 +1419,10 @@ namespace AIStudio.Wpf.DiagramDesigner
                 {
                     DoCommandManager.DoNewCommand(this.ToString(),
                         () => {
-                            foreach (var item in items)
-                            {
-                                Items.Remove(item);
-                            }
+                            Delete(items);
                         },
                         () => {
-                            foreach (var item in items)
-                            {
-                                Items.Add(item);
-                            }
+                            Add(items);
                         });
                 }
             }
@@ -1508,21 +1437,20 @@ namespace AIStudio.Wpf.DiagramDesigner
             {
                 DoCommandManager.DoNewCommand(this.ToString(),
                     () => {
-                        foreach (var item in items)
-                        {
-                            Items.Remove(item);
-                        }
+                        Delete(items);
                     },
                     () => {
-                        foreach (var item in items)
-                        {
-                            Items.Add(item);
-                        }
+                        Add(items);
                     });
             }
         }
 
-        protected virtual List<SelectableDesignerItemViewModelBase> Delete(object parameter, bool delete = true)
+        public void Delete(object parameter)
+        {
+            Delete(parameter, true, true);
+        }
+
+        protected virtual List<SelectableDesignerItemViewModelBase> Delete(object parameter, bool delete = true, bool direct = false)
         {
             List<SelectableDesignerItemViewModelBase> itemsToRemove = new List<SelectableDesignerItemViewModelBase>();
             if (parameter is SelectableDesignerItemViewModelBase node)
@@ -1538,22 +1466,25 @@ namespace AIStudio.Wpf.DiagramDesigner
                 itemsToRemove.AddRange(SelectedItems);
             }
 
-            List<SelectableDesignerItemViewModelBase> connectionsToAlsoRemove = new List<SelectableDesignerItemViewModelBase>();
-
-            foreach (var connector in Items.OfType<ConnectionViewModel>())
+            if (direct == false)
             {
-                if (ItemsToDeleteHasConnector(itemsToRemove, connector.SourceConnectorInfo))
-                {
-                    connectionsToAlsoRemove.Add(connector);
-                }
+                List<SelectableDesignerItemViewModelBase> connectionsToAlsoRemove = new List<SelectableDesignerItemViewModelBase>();
 
-                if (ItemsToDeleteHasConnector(itemsToRemove, connector.SinkConnectorInfo))
+                foreach (var connector in Items.OfType<ConnectionViewModel>())
                 {
-                    connectionsToAlsoRemove.Add(connector);
-                }
+                    if (ItemsToDeleteHasConnector(itemsToRemove, connector.SourceConnectorInfo))
+                    {
+                        connectionsToAlsoRemove.Add(connector);
+                    }
 
+                    if (ItemsToDeleteHasConnector(itemsToRemove, connector.SinkConnectorInfo))
+                    {
+                        connectionsToAlsoRemove.Add(connector);
+                    }
+
+                }
+                itemsToRemove.AddRange(connectionsToAlsoRemove);
             }
-            itemsToRemove.AddRange(connectionsToAlsoRemove);
 
             if (itemsToRemove.Any())
             {
@@ -1561,6 +1492,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                 {
                     foreach (var item in itemsToRemove)
                     {
+                        item.Dispose();
                         Items.Remove(item);
                     }
                 }
@@ -2501,7 +2433,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                   groupItem.AddToSelection(true, true);
               },
               () => {
-                  Remove(groupItem);
+                  Delete(groupItem);
                   foreach (DesignerItemViewModelBase item in items)
                   {
                       item.IsSelected = true;
@@ -2533,10 +2465,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             DoCommandManager.DoNewCommand(this.ToString(),
             () => {
-                foreach (DesignerItemViewModelBase groupRoot in groups)
-                {
-                    Remove(groupRoot);
-                }
+                Delete(groups);
                 foreach (var item in items)
                 {
                     item.Key.ParentId = Guid.Empty;
@@ -2544,10 +2473,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                 UpdateZIndex();
             },
             () => {
-                foreach (DesignerItemViewModelBase groupRoot in groups)
-                {
-                    Add(groupRoot);
-                }
+                Add(groups);
                 foreach (var item in items)
                 {
                     item.Key.ParentId = item.Value.Item1;
@@ -3105,13 +3031,101 @@ namespace AIStudio.Wpf.DiagramDesigner
                         port.DisableAttachTo = true;
                         return null;
                     }
-                   
+
                 }
             }
 
             return null;
         }
 
+        /// <summary>
+        /// type=0最近且没有依附；=1
+        /// </summary>
+        /// <param name="blockDesignerItemViewModel"></param>
+        /// <param name="type"></param>
+        /// <returns></returns>
+        public Tuple<FullyCreatedConnectorInfo, FullyCreatedConnectorInfo> FindNearPortToAttachTo(BlockDesignerItemViewModel blockDesignerItemViewModel, bool isExist)
+        {
+            if (blockDesignerItemViewModel == null)
+                return new Tuple<FullyCreatedConnectorInfo, FullyCreatedConnectorInfo>(null, null);
+
+            List<BlockDesignerItemViewModel> items;
+            if (isExist == false)
+            {
+                items = Items.OfType<BlockDesignerItemViewModel>().
+                 Where(p => p != blockDesignerItemViewModel && p != blockDesignerItemViewModel.Parent && p != blockDesignerItemViewModel.Next)
+                 .ToList();
+
+            }
+            else
+            {
+                items = Items.OfType<BlockDesignerItemViewModel>().
+                 Where(p => p != blockDesignerItemViewModel)
+                 .ToList();
+            }
+
+            FullyCreatedConnectorInfo parent = null;
+            FullyCreatedConnectorInfo next = null;
+
+            foreach (var port in items.SelectMany(n => n.Connectors))
+            {
+                foreach (var port2 in blockDesignerItemViewModel.Connectors)
+                {
+                    //parent
+                    if (parent == null)
+                    {
+                        if ((port.Orientation == ConnectorOrientation.Right && port2.Orientation == ConnectorOrientation.Left)
+                            || (port.Orientation == ConnectorOrientation.Bottom && port2.Orientation == ConnectorOrientation.Top))
+                        {
+
+                            if (port.Position.DistanceTo(port2.Position) < DiagramOption.SnappingOption.SnappingRadius)
+                            {
+                                port.DataItem.ShowConnectors = true;
+                                if (port2.CanAttachTo(port) == true)
+                                {
+                                    port.BeAttachTo = true;
+                                    parent = port;
+                                    continue;
+                                }
+                                else
+                                {
+                                    port.DisableAttachTo = true;
+                                }
+
+                            }
+                        }
+                    }
+
+                    //next
+                    if (next == null)
+                    {
+                        if ((port.Orientation == ConnectorOrientation.Left && port2.Orientation == ConnectorOrientation.Right)
+                       || (port.Orientation == ConnectorOrientation.Top && port2.Orientation == ConnectorOrientation.Bottom))
+                        {
+
+                            if (port.Position.DistanceTo(port2.Position) < DiagramOption.SnappingOption.SnappingRadius)
+                            {
+                                port.DataItem.ShowConnectors = true;
+                                if (port2.CanAttachTo(port) == true)
+                                {
+                                    port.BeAttachTo = true;
+                                    next = port;
+                                    continue;
+                                }
+                                else
+                                {
+                                    port.DisableAttachTo = true;
+                                }
+
+                            }
+                        }
+                    }
+                }
+            }
+
+            return new Tuple<FullyCreatedConnectorInfo, FullyCreatedConnectorInfo>(parent, next);
+        }
+
         public void ClearNearPort()
         {
             Items.OfType<DesignerItemViewModelBase>().ToList().SelectMany(n => n.Connectors).Where(p => p.BeAttachTo == true || p.DisableAttachTo == true).ToList()
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs
new file mode 100644
index 0000000..86d2f2a
--- /dev/null
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs
@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using AIStudio.Wpf.DiagramDesigner.Models;
+
+namespace AIStudio.Wpf.DiagramDesigner
+{
+    public class BlockDesignerItemViewModel : DesignerItemViewModelBase
+    {
+        public BlockDesignerItemViewModel()
+        {
+        }
+
+        public BlockDesignerItemViewModel(IDiagramViewModel root) : base(root)
+        {
+        }
+
+        public BlockDesignerItemViewModel(IDiagramViewModel root, SelectableItemBase designer) : base(root, designer)
+        {
+        }
+
+        public BlockDesignerItemViewModel(IDiagramViewModel root, SerializableItem serializableItem, string serializableType) : base(root, serializableItem, serializableType)
+        {
+        }
+
+        protected override void InitNew()
+        {
+            AddConnector(new BlockConnectorInfo(this.Root, this, ConnectorOrientation.Top));
+            AddConnector(new BlockConnectorInfo(this.Root, this, ConnectorOrientation.Bottom));
+        }
+
+        public BlockDesignerItemViewModel Next
+        {
+            get;set;
+        }
+
+        public void AddNext(BlockDesignerItemViewModel next)
+        {
+            next.Left = this.Left;
+            next.Top = this.Top + this.ItemHeight;
+            next.ParentId = this.Id;
+            next.Parent = this;
+            this.Next = next;
+            if (next.Next != null)
+            {
+                next.AddNext(next.Next);
+            }
+        }
+
+        public override void AddToSelection(bool selected, bool clearother)
+        {
+            if (clearother)
+            {
+                foreach (SelectableDesignerItemViewModelBase item in Root.SelectedItems.ToList())
+                {
+                    if (item != this)
+                    {
+                        item.RemoveFromSelection();
+                    }
+                }
+            }
+
+            IsSelected = selected;
+        }
+    }
+}
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/GifImageItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/GifImageItemViewModel.cs
index 037fd03..dad8b97 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/GifImageItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/GifImageItemViewModel.cs
@@ -49,7 +49,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             //propertyChangedSubscription = WhenPropertyChanged.Where(o => o.ToString() == "Left" || o.ToString() == "Top" || o.ToString() == "ItemWidth" || o.ToString() == "ItemHeight").Subscribe(ChangeImageElement);
             //connectorsChangedSubscription = WhenConnectorsChanged.Subscribe(OnConnectorsChanged);
            
-            AddItemCommand = new SimpleCommand(Command_Enable, ExecuteAddItemCommand);
+            AddCommand = new SimpleCommand(Command_Enable, ExecuteAddItemCommand);
             ImageSwitchCommand = new SimpleCommand(Command_Enable, ExecuteImageSwitchCommand);
             BuildMenuOptions();       
         }
@@ -82,7 +82,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        public ICommand AddItemCommand
+        public ICommand AddCommand
         {
             get; private set;
         }
@@ -143,7 +143,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         //            }
         //        }
         //    }
-        //    else if (args.Action == NotifyCollectionChangedAction.Remove)
+        //    else if (args.Action == NotifyCollectionChangedAction.Delete)
         //    {
         //        if (args.OldItems.Count > 0)
         //        {
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/LogicalGateItemViewModelBase.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/LogicalGateItemViewModelBase.cs
index 88b329c..11fa1bf 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/LogicalGateItemViewModelBase.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/LogicalGateItemViewModelBase.cs
@@ -72,7 +72,9 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         protected override void InitNew()
         {
-            base.InitNew();
+            ExecuteAddInput(null);
+            ExecuteAddInput(null);
+            ExecuteAddOutput(null);
         }
 
         private void BuildMenuOptions()
@@ -182,7 +184,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         public override void ClearConnectors()
         {
-            connectors.Clear();
+            Connectors.Clear();
             Input.Clear();
             Output.Clear();
         }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/TextDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/TextDesignerItemViewModel.cs
index 91fc68f..74ecda8 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/TextDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/TextDesignerItemViewModel.cs
@@ -63,7 +63,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         protected override void ClearText()
         {
-            Root.RemoveItemCommand.Execute(this);
+            Root.DeleteCommand.Execute(this);
         }
     }
 }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserDrawingDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserDrawingDesignerItemViewModel.cs
index 15b669b..bdf3c54 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserDrawingDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserDrawingDesignerItemViewModel.cs
@@ -114,7 +114,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             foreach (var g in deleteDrawGeometries)
             {
-                this.Root.Remove(g);
+                this.Root.Delete(g);
             }
 
             return empty;
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserPreviewDrawingDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserPreviewDrawingDesignerItemViewModel.cs
index 7bd648b..cddc6b5 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserPreviewDrawingDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/EraserPreviewDrawingDesignerItemViewModel.cs
@@ -104,7 +104,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             foreach (var g in deleteDrawGeometries)
             {
-                this.Root.Remove(g);
+                this.Root.Delete(g);
             }
 
             return empty;
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/TextDrawingDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/TextDrawingDesignerItemViewModel.cs
index 1954ba6..45bbfa8 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/TextDrawingDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DrawingViewModel/Erasable/TextDrawingDesignerItemViewModel.cs
@@ -97,7 +97,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             if (e.PropertyName == nameof(IsEditing) && _previewTextDesign.IsEditing == false)
             {
                 _previewTextDesign.PropertyChanged -= _previewTextDesign_PropertyChanged;
-                Root?.Remove(_previewTextDesign);
+                Root?.Delete(_previewTextDesign);
 
                 Text = _previewTextDesign?.Text;
                 if (!string.IsNullOrEmpty(Text))
@@ -118,7 +118,7 @@ namespace AIStudio.Wpf.DiagramDesigner
                     this.ItemHeight = _previewTextDesign.ItemHeight;
                     this.Left = _previewTextDesign.Left + 2 + Geometry.Bounds.Left;
                     this.Top = _previewTextDesign.Top + 2 + Geometry.Bounds.Top;
-                    this.Root?.AddItemCommand.Execute(this);
+                    this.Root?.AddCommand.Execute(this);
                     IsLoaded = true;
                 }
             }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs
index e292cf2..074d272 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs
@@ -36,14 +36,6 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get;
         }
-        ICommand AddItemCommand
-        {
-            get;
-        }
-        ICommand RemoveItemCommand
-        {
-            get;
-        }
         ICommand ClearSelectedItemsCommand
         {
             get;
@@ -113,6 +105,14 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get;
         }
+        ICommand AddCommand
+        {
+            get;
+        }
+        ICommand DeleteCommand
+        {
+            get;
+        }
         ICommand CopyCommand
         {
             get;
@@ -125,10 +125,6 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get;
         }
-        ICommand DeleteCommand
-        {
-            get;
-        }
         ICommand LeftMoveCommand
         {
             get;
@@ -340,7 +336,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         void Add(object parameter, bool? isSelected = false);
 
-        void Remove(object parameter);
+        void Delete(object parameter);
 
         void ClearSelectedItems();
 
@@ -366,6 +362,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         #region 公共方法
         FullyCreatedConnectorInfo FindNearPortToAttachTo(ConnectionViewModel partialConnection, ConnectorVertexType connectorVertexType);
         FullyCreatedConnectorInfo FindNearPortToAttachTo(ConnectionViewModel partialConnection);
+        Tuple<FullyCreatedConnectorInfo, FullyCreatedConnectorInfo> FindNearPortToAttachTo(BlockDesignerItemViewModel blockDesignerItemViewModel, bool isExist);
         void ClearNearPort();
         #endregion
         event PropertyChangedEventHandler PropertyChanged;
diff --git a/Extensions/AIStudio.Wpf.Logical/ViewModels/LogicalGateItemViewModel.cs b/Extensions/AIStudio.Wpf.Logical/ViewModels/LogicalGateItemViewModel.cs
index 86266fc..8397628 100644
--- a/Extensions/AIStudio.Wpf.Logical/ViewModels/LogicalGateItemViewModel.cs
+++ b/Extensions/AIStudio.Wpf.Logical/ViewModels/LogicalGateItemViewModel.cs
@@ -101,16 +101,6 @@ namespace AIStudio.Wpf.Logical.ViewModels
 
         }
 
-        protected override void InitNew()
-        {
-            base.InitNew();
-
-            ClearConnectors();
-            ExecuteAddInput(null);
-            ExecuteAddInput(null);
-            ExecuteAddOutput(null);
-        }
-
         public override bool EnableAddInput
         {
             get;
diff --git a/Extensions/AIStudio.Wpf.Mind/ViewModels/MindDiagramViewModel.cs b/Extensions/AIStudio.Wpf.Mind/ViewModels/MindDiagramViewModel.cs
index 82129fd..599b4be 100644
--- a/Extensions/AIStudio.Wpf.Mind/ViewModels/MindDiagramViewModel.cs
+++ b/Extensions/AIStudio.Wpf.Mind/ViewModels/MindDiagramViewModel.cs
@@ -471,7 +471,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
                 () => {
                     if (rootitem != null)
                     {
-                        Remove(rootitem);
+                        Delete(rootitem);
                     }
                 });
 
@@ -785,7 +785,7 @@ namespace AIStudio.Wpf.Mind.ViewModels
             items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
         }
 
-        protected override List<SelectableDesignerItemViewModelBase> Delete(object parameter, bool delete = true)
+        protected override List<SelectableDesignerItemViewModelBase> Delete(object parameter, bool delete = true, bool direct = true)
         {
             List<MindNode> items = new List<MindNode>();
             List<SelectableDesignerItemViewModelBase> others = new List<SelectableDesignerItemViewModelBase>();
@@ -815,39 +815,42 @@ namespace AIStudio.Wpf.Mind.ViewModels
                 //去重
                 items = items.Distinct().ToList();
 
-                Dictionary<MindNode, Tuple<int, MindNode>> indexs = items.ToDictionary(p => p, p => new Tuple<int, MindNode>(p.ParentNode != null ? p.ParentNode.Children.IndexOf(p) : 0, p.ParentNode));
-                DoCommandManager.DoNewCommand(this.ToString(),
-                  () => {
+                if (delete)
+                {
+                    Dictionary<MindNode, Tuple<int, MindNode>> indexs = items.ToDictionary(p => p, p => new Tuple<int, MindNode>(p.ParentNode != null ? p.ParentNode.Children.IndexOf(p) : 0, p.ParentNode));
+                    DoCommandManager.DoNewCommand(this.ToString(),
+                      () => {
 
-                      foreach (var item in items.ToList())
-                      {
-                          item.RemoveFrom();
-                      }
-
-                      if (others.Any())
-                      {
-                          base.Delete(others);
-                      }
-
-                      items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
-                  },
-                  () => {
-                      if (others.Any())
-                      {
-                          base.Add(others);
-                      }
-
-                      foreach (var item in items)
-                      {
-                          item.AddTo(indexs[item].Item2, indexs[item].Item1, false);
-                          if (item.ParentId == Guid.Empty)
+                          foreach (var item in items.ToList())
                           {
-                              item.Offset = new PointBase();
+                              item.RemoveFrom();
                           }
-                      }
 
-                      items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
-                  });
+                          if (others.Any())
+                          {
+                              base.Delete(others);
+                          }
+
+                          items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
+                      },
+                      () => {
+                          if (others.Any())
+                          {
+                              base.Add(others);
+                          }
+
+                          foreach (var item in items)
+                          {
+                              item.AddTo(indexs[item].Item2, indexs[item].Item1, false);
+                              if (item.ParentId == Guid.Empty)
+                              {
+                                  item.Offset = new PointBase();
+                              }
+                          }
+
+                          items.Select(p => p.RootNode).Distinct().ToList().ForEach(p => p.UpdatedLayout());
+                      });
+                }
                 return items.OfType<SelectableDesignerItemViewModelBase>().ToList();
             }
             else
diff --git a/Extensions/AIStudio.Wpf.Mind/ViewModels/MindNode.cs b/Extensions/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
index 39fe706..2099fc2 100644
--- a/Extensions/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
+++ b/Extensions/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
@@ -565,8 +565,8 @@ namespace AIStudio.Wpf.Mind.ViewModels
             }
             var connectors = Root?.Items.OfType<ConnectionViewModel>().Where(p => p.SinkConnectorInfoFully?.DataItem == this).ToList();
 
-            Root?.Remove(this);
-            Root?.Remove(connectors);
+            Root?.Delete(this);
+            Root?.Delete(connectors);
         }
         #endregion
 
@@ -745,12 +745,11 @@ namespace AIStudio.Wpf.Mind.ViewModels
                 {
                     if (item != this)
                     {
-                        item.IsSelected = false;
+                        item.RemoveFromSelection();
                     }
                 }
             }
 
-            Root.SelectedItems.Clear();
             IsSelected = selected;
         }