diff --git a/packages/loading/index.wxml b/packages/loading/index.wxml
index 0ee145fc..35ca0e22 100644
--- a/packages/loading/index.wxml
+++ b/packages/loading/index.wxml
@@ -9,7 +9,7 @@
     <view
       wx:if="{{ type === 'spinner' }}"
       wx:for="item in 12"
-      wx:key="{{ index }}"
+      wx:key="index"
       class="van-loading__dot"
     />
   </view>