diff --git a/dist/btn/index.wxss b/dist/btn/index.wxss
index 0d3e4060..04a9d145 100644
--- a/dist/btn/index.wxss
+++ b/dist/btn/index.wxss
@@ -60,7 +60,7 @@
   padding-left: 5px;
   padding-right: 5px;
 }
-.zui-btn--big {
+.zui-btn--large {
   border-radius: 0;
   margin-bottom: 0;
   border: none;
diff --git a/example/btn/index.wxml b/example/btn/index.wxml
index ac3dd5d7..2d659adb 100644
--- a/example/btn/index.wxml
+++ b/example/btn/index.wxml
@@ -8,9 +8,9 @@
   </view>
 
   <view class="zui-panel">
-    <button class="zui-btn zui-btn--big zui-btn--primary">确认付款</button>
-    <button class="zui-btn zui-btn--big zui-btn--warn">立即购买</button>
-    <button class="zui-btn zui-btn--big zui-btn--danger">立即购买</button>
+    <button class="zui-btn zui-btn--large zui-btn--primary">确认付款</button>
+    <button class="zui-btn zui-btn--large zui-btn--warn">立即购买</button>
+    <button class="zui-btn zui-btn--large zui-btn--danger">立即购买</button>
   </view>
 
   <view class="zui-panel" style="padding: 15px;">
diff --git a/example/dialog/index.wxml b/example/dialog/index.wxml
index 7faacbf8..b0335096 100644
--- a/example/dialog/index.wxml
+++ b/example/dialog/index.wxml
@@ -2,7 +2,7 @@
 
   <view class="zui-btns">
     <button
-      class="zui-btn zui-btn--primary zui-btn--big"
+      class="zui-btn zui-btn--primary zui-btn--large"
       bindtap="toggleDialog"
       style="margin-top: 40vh;"
     >
diff --git a/example/toast/index.wxml b/example/toast/index.wxml
index a7ec390d..e3dcbb9a 100644
--- a/example/toast/index.wxml
+++ b/example/toast/index.wxml
@@ -3,7 +3,7 @@
 <view class="container">
   <view class="zui-btns">
     <button
-      class="zui-btn zui-btn--primary zui-btn--big"
+      class="zui-btn zui-btn--primary zui-btn--large"
       catchtap="showToast"
       style="margin-top: 40vh;"
     >
diff --git a/example/toptips/index.wxml b/example/toptips/index.wxml
index ca1a3e11..c46d5499 100644
--- a/example/toptips/index.wxml
+++ b/example/toptips/index.wxml
@@ -3,7 +3,7 @@
 <view class="container">
   <view class="zui-btns">
     <button
-      class="zui-btn zui-btn--primary zui-btn--big"
+      class="zui-btn zui-btn--primary zui-btn--large"
       catchtap="showTopTips"
       style="margin-top: 40vh;"
     >