diff --git a/components/dropdown/demo/basic.md b/components/dropdown/demo/basic.md
index 3c27b4ec88..a516eac39b 100644
--- a/components/dropdown/demo/basic.md
+++ b/components/dropdown/demo/basic.md
@@ -29,3 +29,9 @@ React.render(
   </Dropdown>
 , document.getElementById('components-dropdown-demo-basic'));
 ````
+
+<style>
+.code-box-demo .ant-btn {
+  margin-right: 6px;
+}
+</style>