diff --git a/packages/switch/index.less b/packages/switch/index.less
index e0890fbc..01ec9a70 100644
--- a/packages/switch/index.less
+++ b/packages/switch/index.less
@@ -29,6 +29,8 @@
     position: absolute !important;
     top: 25%;
     left: 25%;
+    width: 50%;
+    height: 50%;
   }
 
   &--on {
diff --git a/packages/switch/index.wxml b/packages/switch/index.wxml
index 147d6189..31a104df 100644
--- a/packages/switch/index.wxml
+++ b/packages/switch/index.wxml
@@ -6,6 +6,6 @@
   bind:tap="onClick"
 >
   <view class="van-switch__node node-class">
-    <van-loading wx:if="{{ loading }}" color="{{ loadingColor }}" size="50%" custom-class="van-switch__loading" />
+    <van-loading wx:if="{{ loading }}" color="{{ loadingColor }}" custom-class="van-switch__loading" />
   </view>
 </view>