diff --git a/typescript/core/func/string.ts b/typescript/core/func/string.ts
new file mode 100644
index 000000000..b8d8f3074
--- /dev/null
+++ b/typescript/core/func/string.ts
@@ -0,0 +1,56 @@
+/**
+ * 判断字符串是否已指定的字符串开始
+ * @param str source字符串
+ * @param {String} startTag   指定的开始字符串
+ * @return {Boolean}  如果字符串以指定字符串开始则返回true，否则返回false
+ */
+export declare type _startWith = (str: string, startTag: string) => boolean;
+
+/**
+ * 判断字符串是否以指定的字符串结束
+ * @param str source字符串
+ * @param {String} endTag 指定的字符串
+ * @return {Boolean}  如果字符串以指定字符串结束则返回true，否则返回false
+ */
+export declare type _endWith = (str: string, endTag: string) =>  boolean;
+
+/**
+ * 获取url中指定名字的参数
+ * @param str source字符串
+ * @param {String} name 参数的名字
+ * @return {String} 参数的值
+ */
+export declare type _getQuery = (str: string, name: string) =>  string|null;
+
+/**
+ * 给url加上给定的参数
+ * @param str source字符串
+ * @param {Object} paras 参数对象，是一个键值对对象
+ * @return {String} 添加了给定参数的url
+ */
+export declare type _appendQuery = (str: string, paras: {[key: string]: string|number}) => string;
+
+/**
+ * 将所有符合第一个字符串所表示的字符串替换成为第二个字符串
+ * @param str source字符串
+ * @param {String} s1 要替换的字符串的正则表达式
+ * @param {String} s2 替换的结果字符串
+ * @returns {String} 替换后的字符串
+ */
+export declare type _replaceAll = (str: string, s1: string, s2: string) => string;
+
+/**
+ * 总是让字符串以指定的字符开头
+ * @param str source字符串
+ * @param {String} start 指定的字符
+ * @returns {String} 以指定字符开头的字符串
+ */
+export declare type _perfectStart = (str: string, start: string) => string;
+
+/**
+ * 获取字符串中某字符串的所有项位置数组
+ * @param str source字符串
+ * @param {String} sub 子字符串
+ * @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 declare type _allIndexOf = (str: string, sub: string) => number[];
diff --git a/typescript/index.ts b/typescript/index.ts
index 95723ce61..92ff0b0c5 100644
--- a/typescript/index.ts
+++ b/typescript/index.ts
@@ -1,6 +1,7 @@
 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";
 
 export declare module BI {
     namespace i18n {
@@ -13,4 +14,12 @@ export declare module BI {
     const pushArray: _pushArray;
     const pushDistinct: _pushDistinct;
     const pushDistinctArray: _pushDistinctArray;
+
+    const startWith: _startWith;
+    const endWith: _endWith;
+    const getQuery: _getQuery;
+    const appendQuery: _appendQuery;
+    const replaceAll: _replaceAll;
+    const perfectStart: _perfectStart;
+    const allIndexOf: _allIndexOf;
 }