diff --git a/AIStudio.Wpf.DiagramDesigner/Enums/ValueTypePoint.cs b/AIStudio.Wpf.DiagramDesigner/Enums/ValueTypePoint.cs
index c2dcfba..ec68c36 100644
--- a/AIStudio.Wpf.DiagramDesigner/Enums/ValueTypePoint.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Enums/ValueTypePoint.cs
@@ -6,9 +6,11 @@ namespace AIStudio.Wpf.DiagramDesigner
 {
     public enum ConnectorValueType
     {
+        //前面分给值类型，值类型之间可以兼容，直接转换
         Real = 0,
         Int = 1,
         Bool = 2,
-        String = 3,
+        ValueType = 10,
+        String = 11,
     }
 }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/LogicalConnectorInfo.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/LogicalConnectorInfo.cs
index 9b92bbb..f739255 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/LogicalConnectorInfo.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/Connector/LogicalConnectorInfo.cs
@@ -15,7 +15,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         public LogicalConnectorInfo(IDiagramViewModel root, DesignerItemViewModelBase dataItem, ConnectorOrientation orientation, bool isInnerPoint = false, bool isPortless = false, ConnectorValueType valueTypePoint = ConnectorValueType.Real) : base(root, dataItem, orientation, isInnerPoint, isPortless)
         {
             this.ConnectorValueType = valueTypePoint;
-        }     
+        }
 
         public LogicalConnectorInfo(IDiagramViewModel root, DesignerItemViewModelBase dataItem, SelectableItemBase designer) : base(root, dataItem, designer)
         {
@@ -42,7 +42,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        public double _connectorValue;
+        private double _connectorValue;
         public double ConnectorValue
         {
             get
@@ -55,7 +55,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        public string _connectorString;
+        private string _connectorString;
         public string ConnectorString
         {
             get
@@ -68,7 +68,7 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        public ConnectorValueType _connectorValueType;
+        private ConnectorValueType _connectorValueType;
         public ConnectorValueType ConnectorValueType
         {
             get
@@ -81,9 +81,42 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
-        public bool IsError
+        public bool ConnectorError
         {
-            get;set;
+            get; set;
+        }
+
+        public bool ValueError
+        {
+            get; set;
+        }
+
+        public string ErrorMessage
+        {
+            get; set;
+        }
+
+        public override bool CanAttachTo(FullyCreatedConnectorInfo port)
+        {
+            if (!base.CanAttachTo(port))
+            {
+                return false;
+            }
+
+            if (port is LogicalConnectorInfo logical)
+            {
+                if (logical.ConnectorValueType == ConnectorValueType.String && this.ConnectorValueType == logical.ConnectorValueType)
+                {
+                    return true;
+                }
+                else if (logical.ConnectorValueType <= ConnectorValueType.ValueType && this.ConnectorValueType <= ConnectorValueType.ValueType)
+                {
+                    return true;
+                }
+            }
+
+            return false;
+
         }
     }
 }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/LogicalGateItemViewModelBase.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/LogicalGateItemViewModelBase.cs
index 989be5a..eece016 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/LogicalGateItemViewModelBase.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/LogicalGateItemViewModelBase.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.ObjectModel;
+using System.ComponentModel.DataAnnotations;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
@@ -280,20 +281,29 @@ namespace AIStudio.Wpf.DiagramDesigner
 
                 if (connector.SourceConnectorInfo.DataItem is LogicalGateItemViewModelBase)
                 {
-                    input.Value.ConnectorValue = (connector.SourceConnectorInfo as LogicalConnectorInfo).ConnectorValue;
-                    input.Value.ConnectorString = (connector.SourceConnectorInfo as LogicalConnectorInfo).ConnectorString;
+                    var output = (connector.SourceConnectorInfo as LogicalConnectorInfo);
+                    connector.ColorViewModel.LineColor.Color = output.ColorViewModel.FillColor.Color;
+                    connector.ColorViewModel.FillColor.Color = output.ColorViewModel.FillColor.Color;
 
-                    input.Value.ColorViewModel.FillColor.Color = connector.SourceConnectorInfo.ColorViewModel.FillColor.Color;
-                    connector.ColorViewModel.LineColor.Color = connector.SourceConnectorInfo.ColorViewModel.FillColor.Color;
-                    connector.ColorViewModel.FillColor.Color = connector.SourceConnectorInfo.ColorViewModel.FillColor.Color;
-
-                    if (LogicalType == LogicalType.Output)
+                    if (input.Value.CanAttachTo(output))
                     {
-                        input.Value.ConnectorValueType = (connector.SourceConnectorInfo as LogicalConnectorInfo).ConnectorValueType;
+                        input.Value.ConnectorValue = output.ConnectorValue;
+                        input.Value.ConnectorString = output.ConnectorString;
+                        input.Value.ColorViewModel.FillColor.Color = connector.SourceConnectorInfo.ColorViewModel.FillColor.Color;
+                        if (LogicalType == LogicalType.Output)
+                        {
+                            input.Value.ConnectorValueType = (connector.SourceConnectorInfo as LogicalConnectorInfo).ConnectorValueType;
+                        }
+                        else if (LogicalType == LogicalType.NOT)
+                        {
+                            input.Value.ConnectorValueType = ((connector.SourceConnectorInfo as LogicalConnectorInfo).ConnectorValueType == ConnectorValueType.Bool) ? ConnectorValueType.Bool : ConnectorValueType.Int;
+                        }
                     }
-                    else if (LogicalType == LogicalType.NOT)
+                    else
                     {
-                        input.Value.ConnectorValueType = ((connector.SourceConnectorInfo as LogicalConnectorInfo).ConnectorValueType == ConnectorValueType.Bool) ? ConnectorValueType.Bool : ConnectorValueType.Int;
+                        input.Value.ConnectorError = true;
+                        input.Value.ErrorMessage = "连接类型不匹配";
+                        input.Value.ColorViewModel.FillColor.Color = Colors.Orange;
                     }
                 }
             }
@@ -303,7 +313,7 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             foreach (var output in Output)
             {
-                if (output.Value.IsError)
+                if (output.Value.ValueError)
                 {
                     output.Value.ColorViewModel.FillColor.Color = Colors.Orange;
                 }