diff --git a/packages/components/dropdown/style/css.ts b/packages/components/dropdown/style/css.ts
index 2566c32bd2..7c240db9eb 100644
--- a/packages/components/dropdown/style/css.ts
+++ b/packages/components/dropdown/style/css.ts
@@ -1,5 +1,6 @@
 import '@element-plus/components/base/style/css'
 import '@element-plus/components/button/style/css'
+import '@element-plus/components/button-group/style/css'
 import '@element-plus/components/popper/style/css'
 import '@element-plus/components/scrollbar/style/css'
 import '@element-plus/theme-chalk/el-dropdown.css'
diff --git a/packages/components/dropdown/style/index.ts b/packages/components/dropdown/style/index.ts
index 30a3bfd657..08be7680fd 100644
--- a/packages/components/dropdown/style/index.ts
+++ b/packages/components/dropdown/style/index.ts
@@ -1,5 +1,6 @@
 import '@element-plus/components/base/style'
 import '@element-plus/components/button/style'
+import '@element-plus/components/button-group/style'
 import '@element-plus/components/popper/style'
 import '@element-plus/components/scrollbar/style'
 import '@element-plus/theme-chalk/src/dropdown.scss'