diff --git a/packages/fineui/src/core/wrapper/layout/layout.card.js b/packages/fineui/src/core/wrapper/layout/layout.card.js
index d1247e4e3..940831926 100644
--- a/packages/fineui/src/core/wrapper/layout/layout.card.js
+++ b/packages/fineui/src/core/wrapper/layout/layout.card.js
@@ -107,7 +107,7 @@ export class CardLayout extends Layout {
             throw new Error("cardName not exist", cardName);
         }
 
-        const child = this._children[this._getChildName(cardName)];
+        let child = this._children[this._getChildName(cardName)];
         this._deleteCardByName(cardName);
         if (child) {
             child._destroy();