diff --git a/src/DatabaseServices/ObjectCollection.ts b/src/DatabaseServices/ObjectCollection.ts
index 4e4154d67..31c04b743 100644
--- a/src/DatabaseServices/ObjectCollection.ts
+++ b/src/DatabaseServices/ObjectCollection.ts
@@ -19,13 +19,14 @@ export class ObjectCollection<T> extends CADObject
         if (obj.Id)
         {
             console.warn("同一个对象不能重复加入图纸!");
-            // return;
+            return;
         }
         if (this._db && !obj.Id)
         {
             obj.InitObjectId(this._db);
         }
         this.objectCol.push(obj);
+        this.AppendEvent(obj);
 
         let undoRec = this.UndoRecord();
         if (undoRec)
@@ -38,6 +39,10 @@ export class ObjectCollection<T> extends CADObject
         }
 
         return obj.Id;
+    }
+    AppendEvent(obj: CADObject)
+    {
+
     }
     Remove(obj: CADObject)
     {
@@ -96,7 +101,8 @@ export class ObjectCollection<T> extends CADObject
         if (undoData instanceof CreateObjectData)
         {
             let obj = undoData.getObject(this._db);
-            this.Append(obj);
+            this.objectCol.push(obj);
+            this.AppendEvent(obj);
         }
         else if (undoData instanceof RemoveObjectData)
         {
diff --git a/src/GraphicsSystem/Viewer.ts b/src/GraphicsSystem/Viewer.ts
index 28e266617..0141b96d1 100644
--- a/src/GraphicsSystem/Viewer.ts
+++ b/src/GraphicsSystem/Viewer.ts
@@ -264,7 +264,7 @@ export class Viewer
             this.m_bNeedUpdate = true;
         }
         renderEntitys();
-        xaop.begin(db.ModelSpace, db.ModelSpace.Append, (e) =>
+        xaop.begin(db.ModelSpace, db.ModelSpace.AppendEvent, (e) =>
         {
             let obj = (<Entity>e).Draw(RenderType.Wireframe);
             this.m_Scene.add(obj);