diff --git a/typescript/core/widget.ts b/typescript/core/widget.ts
index fb39f1f65a..2f49c2d531 100644
--- a/typescript/core/widget.ts
+++ b/typescript/core/widget.ts
@@ -40,8 +40,10 @@ export interface _Widget extends _OB {
      * 真实dom的类jQuery对象
      */
     element: {
-        width(width?: number): number;
-        height(height?: number): number;
+        width(): number;
+        height(): number;
+        width(width: number): _Widget['element'];
+        height(height: number): _Widget['element'];
         [key: string]: any;
     };
 
@@ -442,6 +444,8 @@ export declare class Widget extends OB {
     element: {
         width(): number;
         height(): number;
+        width(width: number): _Widget['element'];
+        height(height: number): _Widget['element'];
         [key: string]: any;
     };