diff --git a/src/components/Ellipsis/index.d.ts b/src/components/Ellipsis/index.d.ts
index 6c95bc0ac35ae92263dcf2262362fa7c389268e7..37d508d77335048de87287fc52fb9f457e89dc33 100644
--- a/src/components/Ellipsis/index.d.ts
+++ b/src/components/Ellipsis/index.d.ts
@@ -16,6 +16,6 @@ export interface IEllipsisProps {
 }
 
 export function getStrFullLength(str: string): number;
-export function cutStrByFullLength(str: string, maxLength: number): number;
+export function cutStrByFullLength(str: string, maxLength: number): string;
 
 export default class Ellipsis extends React.Component<IEllipsisProps, any> {}