diff --git a/components/menu/style/index.less b/components/menu/style/index.less
index 0e02e5d360..82d4d8861f 100644
--- a/components/menu/style/index.less
+++ b/components/menu/style/index.less
@@ -217,6 +217,7 @@
     &-popup {
       position: absolute;
       z-index: @zindex-dropdown;
+      background: transparent;
       border-radius: @border-radius-base;
       box-shadow: none;