diff --git a/src/components/cascader/cascader.less b/src/components/cascader/cascader.less
index f2bfddb345..bd18ba4ab7 100644
--- a/src/components/cascader/cascader.less
+++ b/src/components/cascader/cascader.less
@@ -36,3 +36,10 @@
     --height: 310px;
   }
 }
+
+.@{class-prefix-picker}-popup {
+  & .adm-popup-body {
+    border-top-left-radius: 8px;
+    border-top-right-radius: 8px;
+  }
+}
diff --git a/src/components/cascader/cascader.tsx b/src/components/cascader/cascader.tsx
index 6024e31174..3b20528161 100644
--- a/src/components/cascader/cascader.tsx
+++ b/src/components/cascader/cascader.tsx
@@ -168,6 +168,7 @@ export const Cascader = forwardRef<CascaderRef, CascaderProps>((p, ref) => {
     <Popup
       visible={visible}
       position='bottom'
+      className={`${classPrefix}-popup`}
       onMaskClick={() => {
         props.onCancel?.()
         setVisible(false)