diff --git a/components/select/style/index.less b/components/select/style/index.less
index 0151177877..c48d85aedf 100644
--- a/components/select/style/index.less
+++ b/components/select/style/index.less
@@ -456,6 +456,7 @@
     padding-left: 0; // Override default ul/ol
     list-style: none;
     max-height: 250px;
+    overflow: auto;
 
     &-item-group-list {
       margin: 0;