diff --git a/components/calendar/style/index.less b/components/calendar/style/index.less
index 5024345979..02d4d53837 100644
--- a/components/calendar/style/index.less
+++ b/components/calendar/style/index.less
@@ -8,8 +8,8 @@
   outline: none;
   border-top: @border-width-base @border-style-base @border-color-base;
 
-  &-month-select {
-    margin-left: 5px;
+  .@{ant-prefix}-select&-month-select {
+    margin-left: 8px;
   }
 
   &-header {