diff --git a/typescript/core/func/array.ts b/typescript/core/func/array.ts
index e33481f9f..090651efc 100644
--- a/typescript/core/func/array.ts
+++ b/typescript/core/func/array.ts
@@ -4,7 +4,7 @@ export type _pushDistinct = (sArray: any[], obj: any) => void;
 
 export type _pushDistinctArray = (sArray: any[], array: any[]) => void;
 
-declare type _array = {
+type _array = {
     pushArray: _pushArray;
     pushDistinct: _pushDistinct;
     pushDistinctArray: _pushDistinctArray;
diff --git a/typescript/core/func/function.ts b/typescript/core/func/function.ts
index f118d19e1..592d2c106 100644
--- a/typescript/core/func/function.ts
+++ b/typescript/core/func/function.ts
@@ -28,7 +28,7 @@ export type _beforeFunc = (sFunc: Function, func: Function) => Function;
  */
 export type _afterFunc = (sFunc: Function, func: Function) => Function;
 
-declare type _function = {
+type _function = {
     createDistinctName: _createDistinctName;
     getSearchResult: _getSearchResult;
     beforeFunc: _beforeFunc;
diff --git a/typescript/core/func/number.ts b/typescript/core/func/number.ts
index 7b99e5575..d82a95962 100644
--- a/typescript/core/func/number.ts
+++ b/typescript/core/func/number.ts
@@ -31,7 +31,7 @@ export type _mul = (num: number, arg: number) => number;
  */
 export type _div = (num: number, arg: number) => number;
 
-declare type _number = {
+type _number = {
     add: _add;
     sub: _sub;
     mul: _mul;
diff --git a/typescript/core/func/string.ts b/typescript/core/func/string.ts
index 9be899ccd..f0f25a190 100644
--- a/typescript/core/func/string.ts
+++ b/typescript/core/func/string.ts
@@ -54,8 +54,7 @@ export type _perfectStart = (str: string, start: string) => string;
  * @return {Number[]} 子字符串在父字符串中出现的所有位置组成的数组
  */
 export type _allIndexOf = (str: string, sub: string) => number[];
-
-declare type _string = {
+type _string = {
     startWith: _startWith;
     endWith: _endWith;
     getQuery: _getQuery;