diff --git a/src/Editor/GripDragServices.ts b/src/Editor/GripDragServices.ts
index 9819c004b..9682df283 100644
--- a/src/Editor/GripDragServices.ts
+++ b/src/Editor/GripDragServices.ts
@@ -1,4 +1,4 @@
-import { Object3D, Points, Vector3 } from 'three';
+import { BufferGeometry, Line as TLine, Points, Vector3 } from 'three';
 import { end } from 'xaop';
 import { app } from '../ApplicationServices/Application';
 import { ColorMaterial } from '../Common/ColorPalette';
@@ -7,7 +7,9 @@ import { MouseKey } from '../Common/KeyEnum';
 import { GetEntity } from '../Common/Utils';
 import { Entity } from '../DatabaseServices/Entity/Entity';
 import { Line } from '../DatabaseServices/Entity/Line';
+import { BufferGeometryUtils } from '../Geometry/BufferGeometryUtils';
 import { isParallelTo, isPerpendicularityTo, SnapPoint } from '../Geometry/GeUtils';
+import { PointShapeUtils } from '../Geometry/PointShapeUtils';
 import { DrawMode } from '../GraphicsSystem/PreViewer';
 import { CommandWrap } from './CommandMachine';
 import { Editor, EditorService } from './Editor';
@@ -23,7 +25,7 @@ export class GripDragServices implements EditorService
     //最后捕捉的点的位置(在WCS中)
     lastSnapPoint: Vector3;
     private mouseCtrl: MouseControls;
-    SnapSize = 15;
+    private _SnapSize = 15;
     constructor(private ed: Editor)
     {
         this.mouseCtrl = ed.MouseCtrl;
@@ -35,6 +37,20 @@ export class GripDragServices implements EditorService
         });
     }
 
+    get SnapSize() { return this._SnapSize; }
+    set SnapSize(size: number)
+    {
+        if (size !== this._SnapSize)
+        {
+            this._SnapSize = size;
+            if (this.previewCrossLine)
+            {
+                let geo = this.previewCrossLine.geometry as BufferGeometry;
+                BufferGeometryUtils.UpdatePts(geo, PointShapeUtils.CrossLinePts(this._SnapSize));
+            }
+        }
+    }
+
     get IsReady()
     {
         return this.lastSnapPoint && this.ed.InputState === InputState.None;
@@ -222,7 +238,7 @@ export class GripDragServices implements EditorService
     /**
      * 前视图中的光标对象
      */
-    previewCrossLine: Object3D = undefined;
+    previewCrossLine: TLine = undefined;
 
     /**
      * 在前视图中绘制捕捉光标
diff --git a/src/Editor/UserConfig.ts b/src/Editor/UserConfig.ts
index 298261574..3e10b3b4e 100644
--- a/src/Editor/UserConfig.ts
+++ b/src/Editor/UserConfig.ts
@@ -49,7 +49,7 @@ export class UserConfig implements IConfigStore
     @observable SystemConfig: ISystemConfig = {
         maxHightightCount: 1000,
         snapSize: 15,
-        aaType: AAType.FXAA
+        aaType: AAType.SMAA
     };
     constructor()
     {
diff --git a/src/Geometry/PointShapeUtils.ts b/src/Geometry/PointShapeUtils.ts
index c5c7323cc..aa23426d4 100644
--- a/src/Geometry/PointShapeUtils.ts
+++ b/src/Geometry/PointShapeUtils.ts
@@ -3,7 +3,7 @@ import { Vector3 } from "three";
 export class PointShapeUtils
 {
     //方形点表
-    static SquarePts(size)
+    static SquarePts(size: number)
     {
         return [
             new Vector3(-size, -size),
@@ -14,7 +14,7 @@ export class PointShapeUtils
         ];
     }
     //方形外圈十字直线点表
-    static OutsideLinePts(squareSize, lineLength)
+    static OutsideLinePts(squareSize: number, lineLength: number)
     {
         return [
             //-X
diff --git a/src/UI/Components/Modal/OptionModal/ConfigDialog.tsx b/src/UI/Components/Modal/OptionModal/ConfigDialog.tsx
index 4dcfea508..b80ca86b4 100644
--- a/src/UI/Components/Modal/OptionModal/ConfigDialog.tsx
+++ b/src/UI/Components/Modal/OptionModal/ConfigDialog.tsx
@@ -50,6 +50,7 @@ export class ConfigStore extends Singleton
         app.Viewer.AAType = userConfig.SystemConfig.aaType;
         app.Editor.SelectCtrl.MaxHightightCount = userConfig.SystemConfig.maxHightightCount;
         app.Editor.SnapDragServices.SnapSize = userConfig.SystemConfig.snapSize;
+        app.Editor.GetPointServices.snapServices.SnapSize = userConfig.SystemConfig.snapSize;
         await userConfigStore.SaveConfig(BoardModalType.UserConfig, userConfig);
     };
 }
diff --git a/src/UI/Store/UserConfigStore.ts b/src/UI/Store/UserConfigStore.ts
index 44b738004..baf26a7cf 100644
--- a/src/UI/Store/UserConfigStore.ts
+++ b/src/UI/Store/UserConfigStore.ts
@@ -134,6 +134,7 @@ export class UserConfigStore extends Singleton
             app.Viewer.AAType = userConfig.SystemConfig.aaType;
             app.Editor.SelectCtrl.MaxHightightCount = userConfig.SystemConfig.maxHightightCount;
             app.Editor.SnapDragServices.SnapSize = userConfig.SystemConfig.snapSize;
+            app.Editor.GetPointServices.snapServices.SnapSize = userConfig.SystemConfig.snapSize;
         }
         else
         {