diff --git a/components/layout/style/index.less b/components/layout/style/index.less
index 2b79a0e7d5..87f0e81e8a 100644
--- a/components/layout/style/index.less
+++ b/components/layout/style/index.less
@@ -36,7 +36,7 @@
   }
 
   &-sider {
-    transition: all .3s @ease-out;
+    transition: all .15s @ease-in-out;
     position: relative;
     background: @layout-sider-background;
      /* fix firefox can't set width smaller than content on flex item */