diff --git a/src/button/button.less b/src/button/button.less
index 426a7aacb..ed41d1688 100644
--- a/src/button/button.less
+++ b/src/button/button.less
@@ -157,6 +157,7 @@
   &.@{prefix}-size {
     &-l {
       display: flex;
+      width: auto;
       margin: 0 32rpx;
       height: @button-large-height;
       line-height: @button-large-height;