diff --git a/components/tree-select/index.tsx b/components/tree-select/index.tsx
index 46b78441aa1f75d3c8bb49d2b131c06d5b4a2041..c1ab6bfc9c6f2fcfa3b8758bf36c887880912bd1 100644
--- a/components/tree-select/index.tsx
+++ b/components/tree-select/index.tsx
@@ -49,7 +49,7 @@ export default class TreeSelect extends React.Component<TreeSelectProps, any> {
     return (
       <RcTreeSelect
         {...this.props}
-        dropdownStyle={{ maxHeight: '100%', overflow: 'auto', ...dropdownStyle }}
+        dropdownStyle={{ maxHeight: '100vh', overflow: 'auto', ...dropdownStyle }}
         treeCheckable={checkable}
         className={cls}
         notFoundContent={notFoundContent}