diff --git a/AIStudio.Wpf.Mind/ViewModels/MindNode.cs b/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
index a8f5bae..c1ff252 100644
--- a/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
+++ b/AIStudio.Wpf.Mind/ViewModels/MindNode.cs
@@ -100,12 +100,20 @@ namespace AIStudio.Wpf.Mind.ViewModels
             return mindNodeModel;
         }
 
-
-        private bool Level_Enable(object obj)
+        public override void AddToSelection(bool selected)
         {
-            if (Command_Enable(obj) == false) return false;
+            if (NodeLevel == 0)
+            {
+                base.AddToSelection(selected);
+            }
+            else
+            {
 
-            return NodeLevel != 0;
+                foreach (SelectableDesignerItemViewModelBase item in Root.SelectedItems.ToList())
+                    item.IsSelected = false;
+
+                this.IsSelected= true;
+            }
         }
 
         #region 属性
@@ -444,12 +452,12 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         {
                             if (NodeLevel == 0)
                             {
-                                LayoutUpdated();
+                                //LayoutUpdated();
                             }
                             else
                             {
                                 UpdateOffsetX((double)valuePropertyChangedEventArgs.OldValue, (double)valuePropertyChangedEventArgs.NewValue);
-                                LayoutUpdated();
+                                //LayoutUpdated();
                             }
                         }
                         break;
@@ -460,12 +468,12 @@ namespace AIStudio.Wpf.Mind.ViewModels
                         {
                             if (NodeLevel == 0)
                             {
-                                LayoutUpdated();
+                                //LayoutUpdated();
                             }
                             else
                             {
                                 UpdateOffsetY((double)valuePropertyChangedEventArgs.OldValue, (double)valuePropertyChangedEventArgs.NewValue);
-                                LayoutUpdated();
+                                //LayoutUpdated();
                             }
                         }
                         break;