diff --git a/src/main/java/com/project/exam/domain/entity/ExamRecordEntity.java b/src/main/java/com/project/exam/domain/entity/ExamRecordEntity.java
index 897889e..7520b3f 100644
--- a/src/main/java/com/project/exam/domain/entity/ExamRecordEntity.java
+++ b/src/main/java/com/project/exam/domain/entity/ExamRecordEntity.java
@@ -25,7 +25,9 @@ import java.util.function.Supplier;
 @Data
 @Table(name = "evaluator_exam_record" ,
         indexes = {@Index(name = "Idx_taskUserId", columnList = "task_user_id") ,
-        @Index(name = "Idx_businessId_lineId_subLineId" , columnList = "business_id , line_id , sub_line_id")})
+        @Index(name = "Idx_businessId_lineId_subLineId" , columnList = "business_id , line_id , sub_line_id") ,
+        @Index(name = "Idx_submitTime" , columnList = "submit_time")
+        })
 @Entity
 @TableName(value = "evaluator_exam_record" , autoResultMap = true)
 @EqualsAndHashCode(callSuper = true)
diff --git a/src/main/java/com/project/exam/domain/service/impl/AdminSearchExamRecordDomainServiceImpl.java b/src/main/java/com/project/exam/domain/service/impl/AdminSearchExamRecordDomainServiceImpl.java
index f07b98a..1e5d93d 100644
--- a/src/main/java/com/project/exam/domain/service/impl/AdminSearchExamRecordDomainServiceImpl.java
+++ b/src/main/java/com/project/exam/domain/service/impl/AdminSearchExamRecordDomainServiceImpl.java
@@ -64,6 +64,7 @@ public class AdminSearchExamRecordDomainServiceImpl implements AdminSearchExamRe
             queryWrapper.eq(ExamRecordEntity::getTaskName , param.getTaskName());
         }
 
+        queryWrapper.isNotNull(ExamRecordEntity::getSubmitTime);
         IPage<ExamRecordEntity> examRecordEntityIPage = examRecordBaseService.page(
                 PageConverter.toMpPage(param),
                 queryWrapper);