diff --git a/typescript/core/func/function.ts b/typescript/core/func/function.ts
new file mode 100644
index 000000000..b2c34c106
--- /dev/null
+++ b/typescript/core/func/function.ts
@@ -0,0 +1,29 @@
+/**
+ * 创建唯一的名字
+ * @param array 已有的名字集合
+ * @param name 待生成的名字
+ * @return  生成后的名字
+ */
+export declare type _createDistinctName = (array: any[], name: string) => string;
+
+/**
+ * 获取搜索结果
+ * @param items 待搜索的数据
+ * @param keyword 关键字
+ * @param param  搜索哪个属性
+ */
+export declare type _getSearchResult = (items: any, keyword: any, param: string) => {find: any, match: any}
+
+/**
+ * 在方法A执行之前执行方法B
+ * @param sFunc 方法A
+ * @param func 方法B
+ */
+export declare type _beforeFunc = (sFunc: Function, func: Function) => Function;
+
+/**
+ * 在方法A执行之后执行方法B
+ * @param sFunc 方法A
+ * @param func 方法B
+ */
+export declare type _afterFunc = (sFunc: Function, func: Function) => Function;
\ No newline at end of file
diff --git a/typescript/core/func/number.ts b/typescript/core/func/number.ts
new file mode 100644
index 000000000..ae94252c7
--- /dev/null
+++ b/typescript/core/func/number.ts
@@ -0,0 +1,32 @@
+
+/**
+ * 加法函数，用来得到精确的加法结果
+ * @param {Number} num 被加数
+ * @param {Number} arg 加数
+ * @return {Number}  两个数字相加后的结果
+ */
+export declare type _add = (num: number, arg: number) => number;
+
+/**
+ * 减法函数，用来得到精确的减法结果
+ * @param {Number} num 被减数
+ * @param {Number} arg 减数
+ * @return {Number}  两个数字相减后的结果
+ */
+export declare type _sub = (num: number, arg: number) => number;
+
+/**
+ * 乘法函数，用来得到精确的乘法结果
+ * @param {Number} num 被乘数
+ * @param {Number} arg 乘数
+ * @return {Number}  两个数字相乘后的结果
+ */
+export declare type _mul = (num: number, arg: number) => number;
+
+/**
+ * 除法函数，用来得到精确的除法结果
+ * @param {Number} num 被除数
+ * @param {Number} arg 除数
+ * @return {Number}  两个数字相除后的结果
+ */
+export declare type _div = (num: number, arg: number) => number;
\ No newline at end of file
diff --git a/typescript/index.ts b/typescript/index.ts
index 92ff0b0c5..915679a2c 100644
--- a/typescript/index.ts
+++ b/typescript/index.ts
@@ -2,6 +2,8 @@ import { _addI18n, _i18nText } from "./core/i18n";
 import { _OB } from "./core/ob";
 import { _pushArray, _pushDistinct, _pushDistinctArray} from "./core/func/array";
 import {_startWith, _allIndexOf, _appendQuery, _endWith, _getQuery, _perfectStart, _replaceAll} from "./core/func/string";
+import {_add, _sub, _mul, _div} from "./core/func/number";
+import {_afterFunc, _beforeFunc, _createDistinctName, _getSearchResult} from "./core/func/function";
 
 export declare module BI {
     namespace i18n {
@@ -22,4 +24,17 @@ export declare module BI {
     const replaceAll: _replaceAll;
     const perfectStart: _perfectStart;
     const allIndexOf: _allIndexOf;
+
+    const add: _add;
+    const sub: _sub;
+    const mul: _mul;
+    const div: _div;
+
+    const afterFunc: _afterFunc;
+    const beforeFunc: _beforeFunc;
+
+    namespace Func {
+        const createDistinctName: _createDistinctName;
+        const getSearchResult: _getSearchResult;
+    }
 }