diff --git a/src/main/java/com/yunhai/bschclassmanage/service/impl/student/SchStudentImportService.java b/src/main/java/com/yunhai/bschclassmanage/service/impl/student/SchStudentImportService.java
index b555fd1..714fd4a 100644
--- a/src/main/java/com/yunhai/bschclassmanage/service/impl/student/SchStudentImportService.java
+++ b/src/main/java/com/yunhai/bschclassmanage/service/impl/student/SchStudentImportService.java
@@ -157,6 +157,7 @@ public class SchStudentImportService {
                         stu.setStatus(UserStatus.NORMAL.getId());
                         stu.setTransferStatus(TransferStatus.IN.getId());
                         stu.setAbnormalStatus(StuAbnormalStatus.NORMAL.getId());
+                        stu.setSchId(schId);
                     }
                 }
 
diff --git a/src/main/java/com/yunhai/bschclassmanage/service/impl/student/SchStudentInfoService.java b/src/main/java/com/yunhai/bschclassmanage/service/impl/student/SchStudentInfoService.java
index c8665f0..dc8b1a2 100644
--- a/src/main/java/com/yunhai/bschclassmanage/service/impl/student/SchStudentInfoService.java
+++ b/src/main/java/com/yunhai/bschclassmanage/service/impl/student/SchStudentInfoService.java
@@ -62,7 +62,10 @@ public class SchStudentInfoService {
         Integer id = entityDTO.getId();
         Integer classId = entityDTO.getClassId();
 
-        SchStudent entity = ModelMapperUtil.map(entityDTO, SchStudent.class);
+        // 必须使用 SchStudent 实体实例作为目标，避免把 SchStudentDTO（继承 SchStudent 的子类）直接交给 JPA，
+        // 否则 Hibernate 按运行时类型 SchStudentDTO 查找实体会抛出 Unknown entity。
+        SchStudent entity = new SchStudent();
+        ModelMapperUtil.map(entityDTO, entity);
 
         if (StringUtils.isNotBlank(entity.getStuClassNo())) {
             try {