diff --git a/__test__/index.test.ts b/__test__/index.test.ts
index a3e4ddd..e1b1cca 100644
--- a/__test__/index.test.ts
+++ b/__test__/index.test.ts
@@ -5,7 +5,7 @@ import * as url from 'node:url';
 import yaml from 'js-yaml';
 import { describe, test, expect } from '@jest/globals';
 
-import { parse, stringify } from '../src';
+import { parse, parseToMap, stringify, WikiArrayItem, WikiItem } from '../src';
 
 const __dirname = url.fileURLToPath(new URL('.', import.meta.url));
 
@@ -86,3 +86,33 @@ describe('Wiki stringify', () => {
     });
   }
 });
+
+describe('parse map', () => {
+  const item = new WikiItem('A', '', 'array');
+
+  item.values = [new WikiArrayItem(undefined, 'b'), new WikiArrayItem(undefined, 'c')];
+
+  const expected = { type: '', data: new Map([['A', item]]) };
+
+  test('should merge keys', () => {
+    const o = parseToMap(`{{Infobox
+|A= b
+| A=c
+}}
+`);
+
+    expect(o).toEqual(expected);
+  });
+
+  test('should merge previous array keys', () => {
+    const o = parseToMap(`{{Infobox
+|A= {
+[b]
+}
+| A=c
+}}
+`);
+
+    expect(o).toEqual(expected);
+  });
+});
diff --git a/package.json b/package.json
index 7c82ed3..d63e67d 100644
--- a/package.json
+++ b/package.json
@@ -33,6 +33,9 @@
   "lint-staged": {
     "*.{md,js,jsx,ts,tsx,json,yml,yaml}": [
       "prettier --ignore-path ./.prettierignore --write"
+    ],
+    "*.{js,ts}": [
+      "eslint --fix"
     ]
   },
   "files": [
diff --git a/src/index.ts b/src/index.ts
index 981d175..6e63328 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -8,13 +8,32 @@ import {
   WikiSyntaxError,
 } from './error';
 import { prefix, suffix } from './shared';
-import type { Wiki, WikiItemType } from './types';
+import type { Wiki, WikiItemType, WikiMap } from './types';
 import { WikiArrayItem, WikiItem } from './types';
 
 export * from './types';
 export * from './error';
 export { stringify } from './stringify';
 
+/** 解析 wiki 文本，以 `Map` 类型返回解析结果。 会合并重复出现的 key */
+export function parseToMap(s: string): WikiMap {
+  const w = parse(s);
+
+  const data = new Map<string, WikiItem>();
+
+  for (const item of w.data) {
+    const previous = data.get(item.key);
+    if (!previous) {
+      data.set(item.key, item);
+      continue;
+    }
+
+    previous.push(item);
+  }
+
+  return { type: w.type, data };
+}
+
 export function parse(s: string): Wiki {
   const wiki: Wiki = {
     type: '',
diff --git a/src/types.ts b/src/types.ts
index d9722fb..4c35874 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -3,6 +3,12 @@ export interface Wiki {
   data: WikiItem[];
 }
 
+/** JS 的 map 会按照插入顺序排序 */
+export interface WikiMap {
+  type: string;
+  data: Map<string, WikiItem>;
+}
+
 export type WikiItemType = 'array' | 'object';
 
 export class WikiArrayItem {
@@ -36,4 +42,26 @@ export class WikiItem {
       }
     }
   }
+
+  private convertToArray() {
+    if (this.array) {
+      return;
+    }
+
+    this.array = true;
+    this.values ??= [];
+
+    this.values.push(new WikiArrayItem(undefined, this.value));
+    this.value = undefined;
+  }
+
+  push(item: WikiItem) {
+    this.convertToArray();
+
+    if (item.array) {
+      this.values?.push(...(item.values ?? []));
+    } else {
+      this.values?.push(new WikiArrayItem(undefined, item.value));
+    }
+  }
 }