diff --git a/components/drawer/style/drawer.less b/components/drawer/style/drawer.less
index 5893fdfaa4..9b1ac6f135 100644
--- a/components/drawer/style/drawer.less
+++ b/components/drawer/style/drawer.less
@@ -87,6 +87,7 @@
     }
     &.@{drawer-prefix-cls}-open {
       height: 100%;
+      transition: transform @animation-duration-slow @drawer-animation-ease;
     }
   }