diff --git a/packages/ui/tree-select/src/TreeSelect.tsx b/packages/ui/tree-select/src/TreeSelect.tsx
index b34be76a1..8532fd785 100644
--- a/packages/ui/tree-select/src/TreeSelect.tsx
+++ b/packages/ui/tree-select/src/TreeSelect.tsx
@@ -263,6 +263,7 @@ export const TreeSelect = forwardRef<HTMLDivElement | null, TreeSelectProps>(
       >
         {isArrayNonEmpty(treeProps.data) ? (
           <Tree
+            size={'md'}
             className={`${prefixCls}__tree`}
             selectable
             selectedId={value}