diff --git a/src/button/README.md b/src/button/README.md
index 4bae618d0..90c77f9c1 100644
--- a/src/button/README.md
+++ b/src/button/README.md
@@ -149,10 +149,13 @@ How to use: [Custom Theme](#/en-US/theme).
 | Name                             | Default Value        | Description |
 | -------------------------------- | -------------------- | ----------- |
 | @button-mini-height              | `24px`               | -           |
+| @button-mini-padding             | `0 @padding-base`    | -           |
 | @button-mini-font-size           | `@font-size-xs`      | -           |
 | @button-small-height             | `32px`               | -           |
+| @button-small-padding            | `0 @padding-xs`      | -           |
 | @button-small-font-size          | `@font-size-sm`      | -           |
 | @button-normal-font-size         | `@font-size-md`      | -           |
+| @button-normal-padding           | `0 15px`             | -           |
 | @button-large-height             | `50px`               | -           |
 | @button-default-height           | `44px`               | -           |
 | @button-default-line-height      | `1.2`                | -           |
@@ -177,3 +180,4 @@ How to use: [Custom Theme](#/en-US/theme).
 | @button-round-border-radius      | `@border-radius-max` | -           |
 | @button-plain-background-color   | `@white`             | -           |
 | @button-disabled-opacity         | `@disabled-opacity`  | -           |
+| @button-icon-size                | `1.2em`              | -           |
diff --git a/src/button/README.zh-CN.md b/src/button/README.zh-CN.md
index 287974058..57028098b 100644
--- a/src/button/README.zh-CN.md
+++ b/src/button/README.zh-CN.md
@@ -176,10 +176,13 @@ app.use(Button);
 | 名称                             | 默认值               | 描述 |
 | -------------------------------- | -------------------- | ---- |
 | @button-mini-height              | `24px`               | -    |
+| @button-mini-padding             | `0 @padding-base`    | -    |
 | @button-mini-font-size           | `@font-size-xs`      | -    |
 | @button-small-height             | `32px`               | -    |
+| @button-small-padding            | `0 @padding-xs`      | -    |
 | @button-small-font-size          | `@font-size-sm`      | -    |
 | @button-normal-font-size         | `@font-size-md`      | -    |
+| @button-normal-padding           | `0 15px`             | -    |
 | @button-large-height             | `50px`               | -    |
 | @button-default-height           | `44px`               | -    |
 | @button-default-line-height      | `1.2`                | -    |
@@ -204,3 +207,4 @@ app.use(Button);
 | @button-round-border-radius      | `@border-radius-max` | -    |
 | @button-plain-background-color   | `@white`             | -    |
 | @button-disabled-opacity         | `@disabled-opacity`  | -    |
+| @button-icon-size                | `1.2em`              | -    |
diff --git a/src/button/index.less b/src/button/index.less
index 41a4c657d..4f0eb6ecf 100644
--- a/src/button/index.less
+++ b/src/button/index.less
@@ -97,13 +97,13 @@
   }
 
   &--normal {
-    padding: 0 15px;
+    padding: @button-normal-padding;
     font-size: @button-normal-font-size;
   }
 
   &--small {
     height: @button-small-height;
-    padding: 0 @padding-xs;
+    padding: @button-small-padding;
     font-size: @button-small-font-size;
   }
 
@@ -114,7 +114,7 @@
 
   &--mini {
     height: @button-mini-height;
-    padding: 0 @padding-base;
+    padding: @button-mini-padding;
     font-size: @button-mini-font-size;
 
     & + .van-button--mini {
@@ -160,7 +160,7 @@
   }
 
   &__icon {
-    font-size: 1.2em;
+    font-size: @button-icon-size;
     line-height: inherit;
   }
 
diff --git a/src/style/var.less b/src/style/var.less
index 95b598653..5f0e3364f 100644
--- a/src/style/var.less
+++ b/src/style/var.less
@@ -127,9 +127,12 @@
 
 // Button
 @button-mini-height: 24px;
+@button-mini-padding: 0 @padding-base;
 @button-mini-font-size: @font-size-xs;
 @button-small-height: 32px;
+@button-small-padding: 0 @padding-xs;
 @button-small-font-size: @font-size-sm;
+@button-normal-padding: 0 15px;
 @button-normal-font-size: @font-size-md;
 @button-large-height: 50px;
 @button-default-height: 44px;
@@ -155,6 +158,7 @@
 @button-round-border-radius: @border-radius-max;
 @button-plain-background-color: @white;
 @button-disabled-opacity: @disabled-opacity;
+@button-icon-size: 1.2em;
 
 // Calendar
 @calendar-background-color: @white;