diff --git a/src/styles/components/select-dropdown.less b/src/styles/components/select-dropdown.less
index 6cb9f038..ade4d5f5 100644
--- a/src/styles/components/select-dropdown.less
+++ b/src/styles/components/select-dropdown.less
@@ -17,6 +17,7 @@
     z-index: @zindex-select;
     &-transfer{
         z-index: @zindex-transfer;
+        width: auto;
     }
     &.@{transfer-no-max-height} {
         max-height: none;