diff --git a/backend-java/src/main/java/com/competition/modules/biz/review/service/impl/ContestReviewServiceImpl.java b/backend-java/src/main/java/com/competition/modules/biz/review/service/impl/ContestReviewServiceImpl.java
index e3924b8..2f2b85b 100644
--- a/backend-java/src/main/java/com/competition/modules/biz/review/service/impl/ContestReviewServiceImpl.java
+++ b/backend-java/src/main/java/com/competition/modules/biz/review/service/impl/ContestReviewServiceImpl.java
@@ -27,6 +27,7 @@ import com.competition.modules.sys.mapper.SysUserMapper;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.StringUtils;
 
 import java.math.BigDecimal;
@@ -52,13 +53,42 @@ public class ContestReviewServiceImpl implements IContestReviewService {
     // ====== 作品分配 ======
 
     @Override
+    @Transactional(rollbackFor = Exception.class)
     public Map<String, Object> assignWork(Long contestId, Long workId, List<Long> judgeIds, Long creatorId) {
-        log.info("分配作品，赛事ID：{}，作品ID：{}，评委数：{}", contestId, workId, judgeIds.size());
+        if (judgeIds == null) {
+            judgeIds = Collections.emptyList();
+        }
+        // 去重后保持顺序，作为本次期望的评委集合
+        List<Long> desiredOrder = new ArrayList<>(new LinkedHashSet<>(judgeIds));
+        Set<Long> desired = new HashSet<>(desiredOrder);
+
+        log.info("分配作品（同步），赛事ID：{}，作品ID：{}，期望评委数：{}", contestId, workId, desired.size());
+
+        // 1. 取消已分配但不在本次列表中的评委（仅删除未评分的分配行）
+        LambdaQueryWrapper<BizContestWorkJudgeAssignment> existWrapper = new LambdaQueryWrapper<>();
+        existWrapper.eq(BizContestWorkJudgeAssignment::getContestId, contestId);
+        existWrapper.eq(BizContestWorkJudgeAssignment::getWorkId, workId);
+        List<BizContestWorkJudgeAssignment> existing = assignmentMapper.selectList(existWrapper);
+
+        int removed = 0;
+        for (BizContestWorkJudgeAssignment a : existing) {
+            if (desired.contains(a.getJudgeId())) {
+                continue;
+            }
+            LambdaQueryWrapper<BizContestWorkScore> scoreWrapper = new LambdaQueryWrapper<>();
+            scoreWrapper.eq(BizContestWorkScore::getAssignmentId, a.getId());
+            scoreWrapper.eq(BizContestWorkScore::getValidState, 1);
+            if (scoreMapper.selectCount(scoreWrapper) > 0) {
+                throw BusinessException.of(ErrorCode.BAD_REQUEST, "部分评委已提交评分，无法取消其分配，请先处理评分记录");
+            }
+            assignmentMapper.deleteById(a.getId());
+            removed++;
+        }
 
         int created = 0;
         int skipped = 0;
 
-        for (Long judgeId : judgeIds) {
+        for (Long judgeId : desiredOrder) {
             // 检查是否已分配
             LambdaQueryWrapper<BizContestWorkJudgeAssignment> dupWrapper = new LambdaQueryWrapper<>();
             dupWrapper.eq(BizContestWorkJudgeAssignment::getContestId, contestId);
@@ -82,10 +112,11 @@ public class ContestReviewServiceImpl implements IContestReviewService {
             created++;
         }
 
-        log.info("作品分配完成，新建：{}，跳过：{}", created, skipped);
+        log.info("作品分配完成，移除：{}，新建：{}，跳过（已存在）：{}", removed, created, skipped);
 
         Map<String, Object> result = new LinkedHashMap<>();
         result.put("workId", workId);
+        result.put("removed", removed);
         result.put("created", created);
         result.put("skipped", skipped);
         return result;
diff --git a/frontend/src/views/contests/works/WorksDetail.vue b/frontend/src/views/contests/works/WorksDetail.vue
index a2ba400..caa5b2f 100644
--- a/frontend/src/views/contests/works/WorksDetail.vue
+++ b/frontend/src/views/contests/works/WorksDetail.vue
@@ -227,8 +227,7 @@
         <div class="drawer-footer">
           <a-space>
             <a-button @click="handleAssignDrawerClose">取消</a-button>
-            <a-button type="primary" :loading="assignLoading" :disabled="selectedJudgeRows.length === 0"
-              @click="handleConfirmAssign">
+            <a-button type="primary" :loading="assignLoading" @click="handleConfirmAssign">
               确定
             </a-button>
           </a-space>
@@ -576,10 +575,10 @@ const handleJudgeTableChange = (pag: any) => {
   fetchJudgeList()
 }
 
-// 确认分配评委
+// 确认分配评委（可与列表同步：移除的评委在后端删除分配记录）
 const handleConfirmAssign = async () => {
-  if (selectedJudgeRows.value.length === 0) {
-    message.warning("请选择评委")
+  if (isBatchAssign.value && selectedJudgeRows.value.length === 0) {
+    message.warning("批量分配请至少选择一名评委")
     return
   }