diff --git a/packages/button/index.less b/packages/button/index.less
index a1f3dba7..a247f70c 100644
--- a/packages/button/index.less
+++ b/packages/button/index.less
@@ -5,10 +5,10 @@
   position: relative;
   display: inline-block;
   box-sizing: border-box;
-  height: 44px;
+  height: @button-default-height;
   padding: 0;
-  font-size: 16px;
-  line-height: 42px;
+  font-size: @button-default-font-size;
+  line-height: @button-default-line-height;
   text-align: center;
   vertical-align: middle;
   transition: opacity @animation-duration-fast;
@@ -77,7 +77,7 @@
   }
 
   &--plain {
-    .theme(background-color, '@white');
+    .theme(background-color, '@button-plain-background-color');
 
     &.van-button--primary {
       .theme(color, '@button-primary-background-color');
@@ -98,30 +98,30 @@
 
   &--large {
     width: 100%;
-    height: 50px;
-    line-height: 48px;
+    height: @button-large-height;
+    line-height: @button-large-line-height;
   }
 
   &--normal {
     padding: 0 15px;
-    font-size: 14px;
+    font-size: @button-normal-font-size;
   }
 
   &--small {
-    min-width: 60px;
-    height: 30px;
-    padding: 0 8px;
-    font-size: 12px;
-    line-height: 28px;
+    min-width: @button-small-min-width;
+    height: @button-small-height;
+    padding: 0 @padding-xs;
+    font-size: @button-small-font-size;
+    line-height: @button-small-line-height;
   }
 
   /* mini图标默认宽度50px，文字不能超过4个 */
   &--mini {
     display: inline-block;
-    width: 50px;
-    height: 22px;
-    font-size: 10px;
-    line-height: 20px;
+    width: @button-mini-min-width;
+    height: @button-mini-height;
+    font-size: @button-mini-font-size;
+    line-height: @button-mini-line-height;
 
     & + .van-button--mini {
       margin-left: 5px;
@@ -142,7 +142,7 @@
   }
 
   &--disabled {
-    opacity: 0.5;
+    opacity: @button-disabled-opacity;
   }
 
   &__text {
diff --git a/packages/common/style/var.less b/packages/common/style/var.less
index 845b63eb..dc986b16 100644
--- a/packages/common/style/var.less
+++ b/packages/common/style/var.less
@@ -60,11 +60,26 @@
 
 // Button
 @button-default-color: @text-color;
+@button-default-height: 44px;
+@button-default-line-height: 42px;
+@button-default-font-size: @font-size-lg;
 @button-default-background-color: @white;
 @button-default-border-color: @border-color;
+@button-large-height: 50px;
+@button-large-line-height: 48px;
+@button-small-height: 30px;
+@button-small-font-size: @font-size-sm;
+@button-small-min-width: 60px;
+@button-small-line-height: 28px;
+@button-mini-height: 22px;
+@button-mini-min-width: 50px;
+@button-mini-font-size: @font-size-xs;
+@button-mini-line-height: 20px;
+@button-normal-font-size: @font-size-md;
 @button-primary-color: @white;
 @button-primary-background-color: @green;
 @button-primary-border-color: @green;
+@button-plain-background-color: @white;
 @button-info-color: @white;
 @button-info-background-color: @blue;
 @button-info-border-color: @blue;
@@ -80,6 +95,7 @@
 @button-bottom-action-primary-background-color: @red;
 @button-border-radius: 2px;
 @button-round-border-radius: 10em;
+@button-disabled-opacity: .5;
 
 // Card
 @card-padding: @padding-xs @padding-md;