diff --git a/PythonProject/dao/grade_dao.py b/PythonProject/dao/grade_dao.py
index daffaf5..7afd623 100644
--- a/PythonProject/dao/grade_dao.py
+++ b/PythonProject/dao/grade_dao.py
@@ -1,4 +1,4 @@
-from fastapi import Depends
+from fastapi import Depends,HTTPException
 
 from util.database import get_db
 
@@ -7,4 +7,9 @@ from model.grade_model import *
 
 def get_grade( stu_id:int
               ,db=Depends(get_db)):
-    r =db.query(WlScore).filter(WlScore.stu_id == stu_id).all()
\ No newline at end of file
+
+    r1 =db.query(WlScore).filter(WlScore.stu_id == stu_id,WlScore.delete_status == 0).all()
+    if r1:
+        return r1
+    else:
+        raise HTTPException(status_code=404,detail="学生不存在")