diff --git a/packages/button/README.md b/packages/button/README.md
index c7026262..c5c03135 100644
--- a/packages/button/README.md
+++ b/packages/button/README.md
@@ -120,7 +120,7 @@
 | size | 按钮尺寸，可选值为 `normal` `large` `small` `mini` | _string_ | `normal` | - |
 | color | 按钮颜色，支持传入`linear-gradient`渐变色 | _string_ | - | 1.0.0 |
 | icon | 左侧图标名称或图片链接，可选值见 [Icon 组件](#/icon) | _string_ | - | - |
-| class-prefix | 类名前缀 用法等同于[Icon 组件](#/icon) | _string_ | `van-icon` | - |
+| class-prefix | 图标类名前缀，同 Icon 组件的 [class-prefix 属性](#/icon) | _string_ | `van-icon` | - |
 | plain | 是否为朴素按钮 | _boolean_ | `false` | - |
 | block | 是否为块级元素 | _boolean_ | `false` | - |
 | round | 是否为圆形按钮 | _boolean_ | `false` | - |
diff --git a/packages/button/index.ts b/packages/button/index.ts
index d19e2edb..840d0f5b 100644
--- a/packages/button/index.ts
+++ b/packages/button/index.ts
@@ -77,7 +77,7 @@ VantComponent({
         this.$emit('click');
       }
     },
-    
+
     noop() {},
   },
 });
diff --git a/packages/button/index.wxml b/packages/button/index.wxml
index ae61b6b9..30abac96 100644
--- a/packages/button/index.wxml
+++ b/packages/button/index.wxml
@@ -40,7 +40,7 @@
       wx:if="{{ icon }}"
       size="1.2em"
       name="{{ icon }}"
-      class-prefix="{{classPrefix}}"
+      class-prefix="{{ classPrefix }}"
       class="van-button__icon"
       custom-style="line-height: inherit;"
     />