diff --git a/server/routes/admin.ts b/server/routes/admin.ts
index 04da042..5ffa985 100644
--- a/server/routes/admin.ts
+++ b/server/routes/admin.ts
@@ -12,7 +12,10 @@ import csv from 'csv-parser';
 import { Word, WordRecord, WordSet, VocabularyTestAttempt, VocabularyTestRecord } from '../models/Vocabulary';
 import mongoose from 'mongoose';
 import { INVALIDATING_VOCABULARY_RISK_FLAGS } from '../utils/vocabularyRisk';
-import { buildVocabularySummaryFilters } from '../utils/vocabularyAuditFilters';
+import {
+  applyVocabularySummaryItemFilters,
+  buildVocabularySummaryFilters
+} from '../utils/vocabularyAuditFilters';
 
 const router = express.Router();
 const adminController = new AdminController();
@@ -542,7 +545,7 @@ router.get('/vocabulary/test-pass-summary', adminAuth, async (req, res) => {
       return res.status(400).json({ message: summaryFilters.error });
     }
 
-    const { userMatchStages, baseMatch } = summaryFilters;
+    const { userMatchStages, baseMatch, minUniqueWords } = summaryFilters;
     const validPassItems = await VocabularyTestRecord.aggregate([
       {
         $match: {
@@ -691,7 +694,7 @@ router.get('/vocabulary/test-pass-summary', adminAuth, async (req, res) => {
       });
     });
 
-    const items = Array.from(itemMap.values()).sort((left, right) => {
+    const items = applyVocabularySummaryItemFilters(Array.from(itemMap.values()), minUniqueWords).sort((left, right) => {
       const passedDelta = (right.passedWords || 0) - (left.passedWords || 0);
       if (passedDelta !== 0) return passedDelta;
 
diff --git a/server/utils/vocabularyAuditFilters.test.ts b/server/utils/vocabularyAuditFilters.test.ts
index c61702b..d03acc3 100644
--- a/server/utils/vocabularyAuditFilters.test.ts
+++ b/server/utils/vocabularyAuditFilters.test.ts
@@ -1,27 +1,26 @@
 import assert from 'node:assert/strict';
-import { buildVocabularySummaryFilters } from './vocabularyAuditFilters';
+import {
+  applyVocabularySummaryItemFilters,
+  buildVocabularySummaryFilters
+} from './vocabularyAuditFilters';
 
-const correctWordFilter = buildVocabularySummaryFilters({ minCorrectWords: '40' });
-assert.deepEqual(correctWordFilter, {
-  minCorrectWords: 40,
+const uniqueWordFilter = buildVocabularySummaryFilters({ minUniqueWords: '40' });
+assert.deepEqual(uniqueWordFilter, {
+  minUniqueWords: 40,
   userMatchStages: [],
-  baseMatch: {
-    'stats.correctWords': { $gte: 40 }
-  }
+  baseMatch: {}
 });
 
-const legacyFilter = buildVocabularySummaryFilters({ minWords: '35' });
+const legacyFilter = buildVocabularySummaryFilters({ minCorrectWords: '35' });
 assert.deepEqual(legacyFilter, {
-  minCorrectWords: 35,
+  minUniqueWords: 35,
   userMatchStages: [],
-  baseMatch: {
-    'stats.correctWords': { $gte: 35 }
-  }
+  baseMatch: {}
 });
 
 const emptyFilter = buildVocabularySummaryFilters({});
 assert.deepEqual(emptyFilter, {
-  minCorrectWords: undefined,
+  minUniqueWords: undefined,
   userMatchStages: [],
   baseMatch: {}
 });
@@ -36,7 +35,14 @@ assert.deepEqual(studentFilter.userMatchStages, [{
   }
 }]);
 
-const invalidFilter = buildVocabularySummaryFilters({ minCorrectWords: '4.5' });
-assert.deepEqual(invalidFilter, { error: '正确单词数量必须是正整数' });
+const invalidFilter = buildVocabularySummaryFilters({ minUniqueWords: '4.5' });
+assert.deepEqual(invalidFilter, { error: '去重单词数量必须是正整数' });
+
+const filteredItems = applyVocabularySummaryItemFilters([
+  { userId: 'below', uniqueWords: 39 },
+  { userId: 'equal', uniqueWords: 40 },
+  { userId: 'above', uniqueWords: 41 }
+], 40);
+assert.deepEqual(filteredItems.map(item => item.userId), ['equal', 'above']);
 
 console.log('vocabularyAuditFilters tests passed');
diff --git a/server/utils/vocabularyAuditFilters.ts b/server/utils/vocabularyAuditFilters.ts
index f87247c..cdaa7ee 100644
--- a/server/utils/vocabularyAuditFilters.ts
+++ b/server/utils/vocabularyAuditFilters.ts
@@ -18,11 +18,11 @@ const parseOptionalPositiveInt = (value: unknown, fieldName: string) => {
 
 export const buildVocabularySummaryFilters = (query: Record<string, any>) => {
   const studentNo = String(query.studentNo || '').trim();
-  const rawMinCorrectWords = query.minCorrectWords ?? query.minWords;
-  const wordCountResult = parseOptionalPositiveInt(rawMinCorrectWords, '正确单词数量');
+  const rawMinUniqueWords = query.minUniqueWords ?? query.minCorrectWords ?? query.minWords;
+  const wordCountResult = parseOptionalPositiveInt(rawMinUniqueWords, '去重单词数量');
   if ('error' in wordCountResult) return { error: wordCountResult.error };
 
-  const minCorrectWords = wordCountResult.value;
+  const minUniqueWords = wordCountResult.value;
   const userMatchStages = studentNo
     ? [{
       $match: {
@@ -35,13 +35,18 @@ export const buildVocabularySummaryFilters = (query: Record<string, any>) => {
     : [];
 
   const baseMatch: Record<string, any> = {};
-  if (typeof minCorrectWords === 'number') {
-    baseMatch['stats.correctWords'] = { $gte: minCorrectWords };
-  }
 
   return {
-    minCorrectWords,
+    minUniqueWords,
     userMatchStages,
     baseMatch
   };
 };
+
+export const applyVocabularySummaryItemFilters = <T extends { uniqueWords?: number }>(
+  items: T[],
+  minUniqueWords?: number
+): T[] => {
+  if (typeof minUniqueWords !== 'number') return items;
+  return items.filter(item => Number(item.uniqueWords || 0) >= minUniqueWords);
+};
diff --git a/src/api/admin.ts b/src/api/admin.ts
index 1ede8e0..e75c057 100644
--- a/src/api/admin.ts
+++ b/src/api/admin.ts
@@ -128,7 +128,7 @@ export interface VocabularyAuditQueryParams {
   start: string;
   end: string;
   studentNo?: string;
-  minCorrectWords?: string;
+  minUniqueWords?: string;
 }
 
 export interface ClearVocabularyPassSummaryResponse {
@@ -347,7 +347,7 @@ export const adminApi = {
     return api.get<VocabularyPassSummaryResponse>('/admin/vocabulary/test-pass-summary', { params });
   },
 
-  clearVocabularyPassSummary: async (data: { userId: string; start: string; end: string; studentNo?: string; minCorrectWords?: string }): Promise<ClearVocabularyPassSummaryResponse> => {
+  clearVocabularyPassSummary: async (data: { userId: string; start: string; end: string; studentNo?: string; minUniqueWords?: string }): Promise<ClearVocabularyPassSummaryResponse> => {
     return api.post<ClearVocabularyPassSummaryResponse>('/admin/vocabulary/test-pass-summary/clear', data);
   },
 
diff --git a/src/components/AdminVocabularyScoreAudit.tsx b/src/components/AdminVocabularyScoreAudit.tsx
index a26cae1..625abd7 100644
--- a/src/components/AdminVocabularyScoreAudit.tsx
+++ b/src/components/AdminVocabularyScoreAudit.tsx
@@ -94,7 +94,7 @@ const getAnswerRows = (record: VocabularyAuditRecordDetail): VocabularyAuditAnsw
 const AdminVocabularyScoreAudit: React.FC = () => {
   const [range, setRange] = useState<[string, string] | null>(null);
   const [studentNo, setStudentNo] = useState('');
-  const [minCorrectWords, setMinCorrectWords] = useState('');
+  const [minUniqueWords, setMinUniqueWords] = useState('');
   const [summary, setSummary] = useState<VocabularyPassSummaryResponse | null>(null);
   const [loading, setLoading] = useState(false);
   const [clearingUserId, setClearingUserId] = useState<string | null>(null);
@@ -106,7 +106,7 @@ const AdminVocabularyScoreAudit: React.FC = () => {
 
   const getFilterParams = () => ({
     studentNo: studentNo.trim() || undefined,
-    minCorrectWords: minCorrectWords.trim() || undefined
+    minUniqueWords: minUniqueWords.trim() || undefined
   });
 
   const fetchSummary = async () => {
@@ -571,9 +571,9 @@ const AdminVocabularyScoreAudit: React.FC = () => {
           <Input
             allowClear
             type="number"
-            placeholder="单次最少正确数"
-            value={minCorrectWords}
-            onChange={event => setMinCorrectWords(event.target.value)}
+            placeholder="最少去重单词数"
+            value={minUniqueWords}
+            onChange={event => setMinUniqueWords(event.target.value)}
             onPressEnter={fetchSummary}
             style={{ width: 180 }}
           />