diff --git a/packages/button/index.wxml b/packages/button/index.wxml
index 63817067..68f22736 100644
--- a/packages/button/index.wxml
+++ b/packages/button/index.wxml
@@ -20,8 +20,8 @@
 >
   <van-loading
     wx:if="{{ loading }}"
-    size="20px"
     custom-class="loading-class"
+    size="{{ size === 'mini' ? '14px' : '20px' }}"
     color="{{ type === 'default' ? '#c9c9c9' : '' }}"
   />
   <slot wx:else />
diff --git a/packages/loading/index.less b/packages/loading/index.less
index ead57aec..83ce7c43 100644
--- a/packages/loading/index.less
+++ b/packages/loading/index.less
@@ -2,7 +2,6 @@
 
 .van-loading {
   z-index: 0;
-  font-size: 0;
   line-height: 0;
   position: relative;
   display: inline-block;
@@ -24,8 +23,8 @@
     &--circular {
       border: 1px solid;
       border-radius: 100%;
-      border-color: currentColor;
-      border-top-color: transparent;
+      border-color: transparent;
+      border-top-color: currentColor
     }
   }
 
@@ -48,7 +47,6 @@
   }
 }
 
-
 .generate(@n, @i: 1) when (@i =< @n) {
   .van-loading__dot:nth-of-type(@{i}) {
     opacity: 1 - (0.75 / 12) * (@i - 1);