diff --git a/demo/js/core/abstract/demo.virtual_group.js b/demo/js/core/abstract/demo.virtual_group.js
index afda6ec1e..0397e5cda 100644
--- a/demo/js/core/abstract/demo.virtual_group.js
+++ b/demo/js/core/abstract/demo.virtual_group.js
@@ -89,6 +89,11 @@ Demo.Item = BI.inherit(BI.Widget, {
         }
     },
 
+    shouldUpdate: function (nextProps) {
+        var o = this.options;
+        return o.type !== nextProps.type || o.key !== nextProps.key || o.value !== nextProps.value;
+    },
+
     update: function (item) {
         this.label.setText(item.value);
         console.log("更新了一项");
diff --git a/dist/demo.js b/dist/demo.js
index 53aa18110..23ac2d8f2 100644
--- a/dist/demo.js
+++ b/dist/demo.js
@@ -7561,6 +7561,11 @@ Demo.Item = BI.inherit(BI.Widget, {
         }
     },
 
+    shouldUpdate: function (nextProps) {
+        var o = this.options;
+        return o.type !== nextProps.type || o.key !== nextProps.key || o.value !== nextProps.value;
+    },
+
     update: function (item) {
         this.label.setText(item.value);
         console.log("更新了一项");