diff --git a/src/main/java/com/project/task/domain/service/impl/CandidateSearchTaskDomainServiceImpl.java b/src/main/java/com/project/task/domain/service/impl/CandidateSearchTaskDomainServiceImpl.java
index 98e51c1..e52d01e 100644
--- a/src/main/java/com/project/task/domain/service/impl/CandidateSearchTaskDomainServiceImpl.java
+++ b/src/main/java/com/project/task/domain/service/impl/CandidateSearchTaskDomainServiceImpl.java
@@ -233,14 +233,19 @@ public class CandidateSearchTaskDomainServiceImpl implements CandidateSearchTask
 
     private void defaultSort(LambdaQueryWrapper<TaskEntity> queryWrapper) {
         String userId = SecurityUtils.getUserId();
-        String sortSql = "ORDER BY CASE " +
-                "WHEN end_time < NOW() THEN 6 " +
-                "WHEN start_time > NOW() THEN 4 " +
-                "WHEN (SELECT status FROM evaluator_task_user WHERE task_id = evaluator_task.id AND user_id = '" + userId + "' AND deleted = 0) = 1 THEN 1 " +
-                "WHEN (SELECT status FROM evaluator_task_user WHERE task_id = evaluator_task.id AND user_id = '" + userId + "' AND deleted = 0) = 0 THEN 2 " +
-                "WHEN (SELECT status FROM evaluator_task_user WHERE task_id = evaluator_task.id AND user_id = '" + userId + "' AND deleted = 0) = 3 THEN 3 " +
-                "WHEN (SELECT status FROM evaluator_task_user WHERE task_id = evaluator_task.id AND user_id = '" + userId + "' AND deleted = 0) = 2 THEN 5 " +
-                "ELSE 99 END ASC, create_time DESC";
+        // 单次子查询，内部组合状态+时间判断，避免重复扫描
+        String sortSql = "ORDER BY (" +
+            "SELECT CASE " +
+            "WHEN tu.status = 1 THEN 1 " +                                          // 已考未通过
+            "WHEN tu.status = 0 AND evaluator_task.start_time <= NOW() AND evaluator_task.end_time >= NOW() THEN 2 " +  // 未考
+            "WHEN tu.status = 3 THEN 3 " +                                          // 评分中
+            "WHEN tu.status = 0 AND evaluator_task.start_time > NOW() THEN 4 " +    // 未开考
+            "WHEN tu.status = 2 THEN 5 " +                                          // 已考已过
+            "WHEN evaluator_task.end_time < NOW() THEN 6 " +                        // 已截止
+            "ELSE 99 END " +
+            "FROM evaluator_task_user tu " +
+            "WHERE tu.task_id = evaluator_task.id AND tu.user_id = '" + userId + "' AND tu.deleted = 0" +
+        ") ASC, create_time DESC";
         queryWrapper.last(sortSql);
     }
 }