diff --git a/packages/fineui/typescript/core/base.ts b/packages/fineui/typescript/core/base.ts
index 5b4a86af3..3b4efbf36 100644
--- a/packages/fineui/typescript/core/base.ts
+++ b/packages/fineui/typescript/core/base.ts
@@ -402,6 +402,8 @@ export declare function getTime(...args: any[]): number;
 
 export declare function clamp(number: number, lower: number, upper: number): number;
 
+export declare function chunk<T>(array: T[], size?: number): T[][];
+
 /**
  * 判断一个对象是不是promise
  * @param obj 对象