diff --git a/lib/common/utils.ts b/lib/common/utils.ts
index 8bdddb5..3998e38 100644
--- a/lib/common/utils.ts
+++ b/lib/common/utils.ts
@@ -1,7 +1,24 @@
-import { DoubleUnicodeReg } from './constant';
+import { DoubleUnicodePrefixReg, DoubleUnicodeSuffixReg, DoubleUnicodeReg } from './constant';
 
-export function getStringLength(string: string) {
-  return string.replace(DoubleUnicodeReg, '_').length;
+export function stringLength(text: string) {
+  return text.replace(DoubleUnicodeReg, '_').length;
+}
+
+// 双音节字符处理
+export function splitString(text: string): string[] {
+  const result = [];
+  let i = 0;
+  while (i < text.length) {
+    const char = text.charAt(i);
+    if (DoubleUnicodePrefixReg.test(char) && DoubleUnicodeSuffixReg.test(text.charAt(i + 1))) {
+      result.push(text.substring(i, i + 2));
+      i += 2;
+    } else {
+      result.push(char);
+      i += 1;
+    }
+  }
+  return result;
 }
 
 export function isZhChar(char: string) {
diff --git a/lib/core/custom/index.ts b/lib/core/custom/index.ts
index 01ccdca..1139ed3 100644
--- a/lib/core/custom/index.ts
+++ b/lib/core/custom/index.ts
@@ -1,6 +1,6 @@
 import { acTree } from '@/common/segmentit';
 import { Probability, Priority } from '@/common/constant';
-import { getStringLength } from '@/common/utils';
+import { splitString, stringLength } from '@/common/utils';
 import DICT1 from '@/data/dict1';
 let customDict: { [key: string]: string } = {};
 let customMultipleDict: string[] = [];
@@ -33,7 +33,7 @@ export function customPinyin(
   options?: CustomPinyinOptions
 ) {
   const keys = Object.keys(config).sort(
-    (key1, key2) => getStringLength(key2) - getStringLength(key1)
+    (key1, key2) => stringLength(key2) - stringLength(key1)
   );
   keys.forEach((key) => {
     customDict[key] = config[key];
@@ -41,7 +41,7 @@ export function customPinyin(
   const customPatterns = Object.keys(customDict).map((key) => ({
     zh: key,
     pinyin: customDict[key],
-    probability: Probability.Custom + getStringLength(key),
+    probability: Probability.Custom + stringLength(key),
     length: key.length,
     priority: Priority.Custom,
     dict: CustomDictName,
@@ -63,10 +63,10 @@ function addCustomConfigToDict(
 ) {
   for (let key in config) {
     const pinyins = config[key];
-    key.split('').forEach((word, index) => {
+    splitString(key).forEach((word, index) => {
       const pinyin = pinyins.split(' ')[index] || '';
       const wordCode = word.charCodeAt(0);
-      if (handleType === 'replace') {
+      if (handleType === 'replace' || (handleType === 'add' && !dict[wordCode] && !DICT1[wordCode])) {
         // 直接覆盖原词典
         dict[wordCode] = pinyin;
       } else {
diff --git a/lib/core/dict/index.ts b/lib/core/dict/index.ts
index 4579ed2..4051128 100644
--- a/lib/core/dict/index.ts
+++ b/lib/core/dict/index.ts
@@ -1,6 +1,6 @@
 import { Priority, Probability } from "@/common/constant";
 import { Pattern, acTree } from "@/common/segmentit";
-import { getStringLength } from "@/common/utils";
+import { stringLength } from "@/common/utils";
 import DICT1 from "@/data/dict1";
 
 const DefaultName = Symbol("default");
@@ -29,7 +29,7 @@ export function addDict(dict: DICT | {}, options?: string | DictOptions) {
   for (let key in dict as DICT) {
     const value = (dict as DICT)[key];
     const pinyin = Array.isArray(value) ? value[0] : value;
-    if (getStringLength(key) === 1) {
+    if (stringLength(key) === 1) {
       addToOriginDict(
         dictName,
         key,
diff --git a/lib/core/match/index.ts b/lib/core/match/index.ts
index c0b70cc..4694179 100644
--- a/lib/core/match/index.ts
+++ b/lib/core/match/index.ts
@@ -1,10 +1,11 @@
-import { pinyin as _pinyin } from '@/core/pinyin';
+import { splitString } from "@/common/utils";
+import { pinyin as _pinyin } from "@/core/pinyin";
 
 interface MatchOptions {
   /**
    * @description 每个汉字和拼音需要遵从的匹配精度
    */
-  precision?: 'first' | 'start' | 'every' | 'any';
+  precision?: "first" | "start" | "every" | "any";
   /**
    * @description 匹配的汉字下标是否为连续的才算匹配成功
    */
@@ -12,11 +13,11 @@ interface MatchOptions {
   /**
    * @description 匹配时对于空格的处理
    */
-  space?: 'ignore' | 'preserve';
+  space?: "ignore" | "preserve";
   /**
    * @description 最后一个字的匹配精度
    */
-  lastPrecision?: 'first' | 'start' | 'every' | 'any';
+  lastPrecision?: "first" | "start" | "every" | "any";
   /**
    * @description 是否大小写不敏感
    */
@@ -24,10 +25,10 @@ interface MatchOptions {
 }
 
 const DefaultMatchOptions: MatchOptions = {
-  precision: 'first',
+  precision: "first",
   continuous: false,
-  space: 'ignore',
-  lastPrecision: 'start',
+  space: "ignore",
+  lastPrecision: "start",
   insensitive: true,
 };
 
@@ -41,8 +42,8 @@ const MAX_PINYIN_LENGTH = 6;
  * @return {Array | null} 若匹配成功，返回 text 中匹配成功的下标数组；若匹配失败，返回 null
  */
 export const match = (text: string, pinyin: string, options?: MatchOptions) => {
-  if (options?.precision === 'any') {
-    options.lastPrecision = 'any';
+  if (options?.precision === "any") {
+    options.lastPrecision = "any";
   }
   const completeOptions = {
     ...DefaultMatchOptions,
@@ -54,14 +55,14 @@ export const match = (text: string, pinyin: string, options?: MatchOptions) => {
     pinyin = pinyin.toLowerCase();
   }
   // 移除空格
-  if (completeOptions.space === 'ignore') {
-    pinyin = pinyin.replace(/\s/g, '');
+  if (completeOptions.space === "ignore") {
+    pinyin = pinyin.replace(/\s/g, "");
   }
   const result =
-    options?.precision === 'any'
+    options?.precision === "any"
       ? matchAny(text, pinyin, completeOptions)
       : matchAboveStart(text, pinyin, completeOptions);
-  return result;
+  return processDoubleUnicodeIndex(text, result);
 };
 
 // 检测两个拼音最大的匹配长度
@@ -81,23 +82,24 @@ const matchAny = (
   options: Required<MatchOptions>
 ) => {
   let result = [];
-  for (let i = 0; i < text.length; i++) {
+  const words = splitString(text);
+  for (let i = 0; i < words.length; i++) {
     // 空格字符
-    if (options.space === 'ignore' && text[i] === ' ') {
+    if (options.space === "ignore" && words[i] === " ") {
       result.push(i);
       continue;
     }
     // 是否为中文匹配
-    if (text[i] === pinyin[0]) {
+    if (words[i] === pinyin[0]) {
       pinyin = pinyin.slice(1);
       result.push(i);
       continue;
     }
     // 当前字的多音字拼音
-    const ps = _pinyin(text[i], {
-      toneType: 'none',
+    const ps = _pinyin(words[i], {
+      toneType: "none",
       multiple: true,
-      type: 'array',
+      type: "array",
     });
     let currentLength = 0;
     ps.forEach((p) => {
@@ -128,8 +130,8 @@ const matchAny = (
       return null;
     }
   }
-  if (options.space === 'ignore') {
-    result = result.filter((i) => text[i] !== ' ');
+  if (options.space === "ignore") {
+    result = result.filter((i) => words[i] !== " ");
   }
   return result.length ? result : null;
 };
@@ -139,7 +141,7 @@ const matchAboveStart = (
   pinyin: string,
   options: Required<MatchOptions>
 ) => {
-  const words = text.split('');
+  const words = splitString(text);
 
   // 二维数组 dp[i][j]，i 表示遍历到的 text 索引+1, j 表示遍历到的 pinyin 的索引+1
   const dp = Array(words.length + 1);
@@ -157,7 +159,7 @@ const matchAboveStart = (
     // options.continuous 为 false 或 options.space 为 ignore 且当前为空格时，第 i 个字可以不参与匹配
     if (
       !options.continuous ||
-      (options.space == 'ignore' && text[i - 1] === ' ')
+      (options.space == "ignore" && words[i - 1] === " ")
     ) {
       for (let j = 1; j <= pinyin.length; j++) {
         dp[i][j - 1] = dp[i - 1][j - 1];
@@ -172,14 +174,14 @@ const matchAboveStart = (
         // 非开头且前面的字符未匹配完成，停止向后匹配
         continue;
       } else {
-        const muls = _pinyin(text[i - 1], {
-          type: 'array',
-          toneType: 'none',
+        const muls = _pinyin(words[i - 1], {
+          type: "array",
+          toneType: "none",
           multiple: true,
         });
 
         // 非中文匹配
-        if (text[i - 1] === pinyin[j - 1]) {
+        if (words[i - 1] === pinyin[j - 1]) {
           const matches = [...dp[i - 1][j - 1], i - 1];
           // 记录最长的可匹配下标数组
           if (!dp[i][j] || matches.length > dp[i][j].length) {
@@ -195,16 +197,16 @@ const matchAboveStart = (
         if (pinyin.length - j <= MAX_PINYIN_LENGTH) {
           // lastPrecision 参数处理
           const last = muls.some((py) => {
-            if (options.lastPrecision === 'any') {
+            if (options.lastPrecision === "any") {
               return py.includes(pinyin.slice(j - 1, pinyin.length));
             }
-            if (options.lastPrecision === 'start') {
+            if (options.lastPrecision === "start") {
               return py.startsWith(pinyin.slice(j - 1, pinyin.length));
             }
-            if (options.lastPrecision === 'first') {
+            if (options.lastPrecision === "first") {
               return py[0] === pinyin.slice(j - 1, pinyin.length);
             }
-            if (options.lastPrecision === 'every') {
+            if (options.lastPrecision === "every") {
               return py === pinyin.slice(j - 1, pinyin.length);
             }
             return false;
@@ -217,7 +219,7 @@ const matchAboveStart = (
         const precision = options.precision;
 
         // precision 为 start 时，匹配开头
-        if (precision === 'start') {
+        if (precision === "start") {
           muls.forEach((py) => {
             let end = j;
             const matches = [...dp[i - 1][j - 1], i - 1];
@@ -234,7 +236,7 @@ const matchAboveStart = (
         }
 
         // precision 为 first 时，匹配首字母
-        if (precision === 'first') {
+        if (precision === "first") {
           if (muls.some((py) => py[0] === pinyin[j - 1])) {
             const matches = [...dp[i - 1][j - 1], i - 1];
             // 记录最长的可匹配下标数组
@@ -261,3 +263,33 @@ const matchAboveStart = (
   }
   return null;
 };
+
+// 对于双字节的字符，需要将 index 顺延 +1
+function processDoubleUnicodeIndex(
+  text: string,
+  indexArray: number[] | null
+): number[] | null {
+  if (!indexArray) {
+    return null;
+  }
+  const result = [];
+  let doubleUnicodeCount = 0;
+  const words = splitString(text);
+  let i = 0;
+  for (let j = 0; j < indexArray.length; j++) {
+    const curIndex = indexArray[j];
+    while (i <= curIndex) {
+      if (words[i].length === 2) {
+        doubleUnicodeCount++;
+      }
+      i++;
+    }
+    const realIndex = curIndex + doubleUnicodeCount;
+    if (words[curIndex].length === 2) {
+      result.push(realIndex - 1, realIndex);
+    } else {
+      result.push(realIndex);
+    }
+  }
+  return result;
+}
diff --git a/lib/core/pinyin/middlewares.ts b/lib/core/pinyin/middlewares.ts
index 6487443..689a4c0 100644
--- a/lib/core/pinyin/middlewares.ts
+++ b/lib/core/pinyin/middlewares.ts
@@ -1,4 +1,4 @@
-import { getStringLength, isZhChar } from "@/common/utils";
+import { stringLength, isZhChar } from "@/common/utils";
 import type { SingleWordResult } from "../../common/type";
 import {
   DoubleUnicodePrefixReg,
@@ -59,7 +59,7 @@ export const middlewareMultiple = (
   word: string,
   options: CompleteOptions
 ): SingleWordResult[] | false => {
-  if (getStringLength(word) === 1 && options.multiple) {
+  if (stringLength(word) === 1 && options.multiple) {
     return getMultiplePinyin(word, options.surname);
   } else {
     return false;
@@ -166,7 +166,7 @@ export const middlewareType = (
   options: CompleteOptions,
   word: string
 ) => {
-  if (options.multiple && getStringLength(word) === 1) {
+  if (options.multiple && stringLength(word) === 1) {
     let last = "";
     list = list.filter((item) => {
       const res = item.result !== last;
diff --git a/lib/core/polyphonic/index.ts b/lib/core/polyphonic/index.ts
index 70e6ef5..9de991d 100644
--- a/lib/core/polyphonic/index.ts
+++ b/lib/core/polyphonic/index.ts
@@ -15,7 +15,7 @@ import {
   getFinalParts,
 } from '@/core/pinyin/handle';
 import { getCustomPolyphonicDict } from '../custom';
-import { isZhChar } from '@/common/utils';
+import { isZhChar, splitString } from '@/common/utils';
 
 interface BasicOptions {
   /**
@@ -206,7 +206,7 @@ function polyphonic(
 
 // 获取每个字多音字的数组
 const getPolyphonicList = (text: string): SingleWordResult[] => {
-  return text.split('').map((word) => {
+  return splitString(text).map((word) => {
     const wordCode = word.charCodeAt(0);
     const customPolyphonicDict = getCustomPolyphonicDict();
     const pinyin = customPolyphonicDict[wordCode] || DICT1[wordCode] || word;
diff --git a/test/match.test.js b/test/match.test.js
index 66eb892..cf3f190 100644
--- a/test/match.test.js
+++ b/test/match.test.js
@@ -1,4 +1,4 @@
-import { match } from '../lib/index';
+import { match, customPinyin, clearCustomDict } from '../lib/index';
 import { expect, describe, it } from 'vitest';
 
 describe('match', () => {
@@ -90,6 +90,17 @@ describe('match', () => {
     expect(result).to.deep.equal([2, 4]);
   });
 
+  it('[match]first&space', () => {
+    customPinyin({
+      𧒽: 'lei'
+    }, {
+      multiple: 'replace'
+    })
+    const result = match('𧒽测 试', 'l c s');
+    expect(result).to.deep.equal([0, 1, 2, 4]);
+    clearCustomDict(['pinyin', 'multiple', 'polyphonic']);
+  });
+
   it('[match]nonZh match', () => {
     const result = match('测uuuuuuuuuu试', 'cuuuuuu');
     expect(result).to.deep.equal([0, 1, 2, 3, 4, 5, 6]);
diff --git a/types/common/utils.d.ts b/types/common/utils.d.ts
index f11a04e..2febf7f 100644
--- a/types/common/utils.d.ts
+++ b/types/common/utils.d.ts
@@ -1,2 +1,3 @@
-export declare function getStringLength(string: string): number;
+export declare function stringLength(text: string): number;
+export declare function splitString(text: string): string[];
 export declare function isZhChar(char: string): boolean;
diff --git a/types/core/match/index.d.ts b/types/core/match/index.d.ts
index 32ccb68..43cc442 100644
--- a/types/core/match/index.d.ts
+++ b/types/core/match/index.d.ts
@@ -2,7 +2,7 @@ interface MatchOptions {
     /**
      * @description 每个汉字和拼音需要遵从的匹配精度
      */
-    precision?: 'first' | 'start' | 'every' | 'any';
+    precision?: "first" | "start" | "every" | "any";
     /**
      * @description 匹配的汉字下标是否为连续的才算匹配成功
      */
@@ -10,11 +10,11 @@ interface MatchOptions {
     /**
      * @description 匹配时对于空格的处理
      */
-    space?: 'ignore' | 'preserve';
+    space?: "ignore" | "preserve";
     /**
      * @description 最后一个字的匹配精度
      */
-    lastPrecision?: 'first' | 'start' | 'every' | 'any';
+    lastPrecision?: "first" | "start" | "every" | "any";
     /**
      * @description 是否大小写不敏感
      */
@@ -27,5 +27,5 @@ interface MatchOptions {
  * @param {MatchOptions=} options 配置项
  * @return {Array | null} 若匹配成功，返回 text 中匹配成功的下标数组；若匹配失败，返回 null
  */
-export declare const match: (text: string, pinyin: string, options?: MatchOptions) => any;
+export declare const match: (text: string, pinyin: string, options?: MatchOptions) => number[] | null;
 export {};