diff --git a/src/examples/app/index.ts b/src/examples/app/index.ts
index f798109..5327f78 100644
--- a/src/examples/app/index.ts
+++ b/src/examples/app/index.ts
@@ -114,17 +114,17 @@ export function initDrawApp(dom: HTMLElement): JlDrawApp {
         return new TrainData();
       }),
     ],
-    isSupportDeletion: (g): boolean => {
-      if (g.type === Signal.Type) {
-        Notify.create({
-          type: 'warning',
-          message: '信号机不支持删除',
-          timeout: 1000,
-        });
-        return false;
-      }
-      return true;
-    },
+    // isSupportDeletion: (g): boolean => {
+    //   if (g.type === Signal.Type) {
+    //     Notify.create({
+    //       type: 'warning',
+    //       message: '信号机不支持删除',
+    //       timeout: 1000,
+    //     });
+    //     return false;
+    //   }
+    //   return true;
+    // },
   });
 
   // 画布右键菜单
diff --git a/src/jlgraphic/app/JlGraphicApp.ts b/src/jlgraphic/app/JlGraphicApp.ts
index 4be56ea..5cf08f3 100644
--- a/src/jlgraphic/app/JlGraphicApp.ts
+++ b/src/jlgraphic/app/JlGraphicApp.ts
@@ -737,7 +737,7 @@ export class GraphicApp extends EventEmitter<GraphicAppEvents> {
   deleteGraphics(...graphics: JlGraphic[]): JlGraphic[] {
     const dels = graphics.filter((g) => {
       if (
-        this._options?.isSupportDeletion &&
+        this._options?.isSupportDeletion == undefined ||
         this._options.isSupportDeletion(g)
       ) {
         this.doDeleteGraphics(g);