diff --git a/PythonProject/model/all_model.py b/PythonProject/model/all_model.py
index 9743859..cd68351 100644
--- a/PythonProject/model/all_model.py
+++ b/PythonProject/model/all_model.py
@@ -1,4 +1,4 @@
-from sqlalchemy import DATETIME,Column,Integer,String,DATE,ForeignKey,Numeric
+from sqlalchemy import DATETIME,Column,Integer,String,DATE,ForeignKey,Numeric,UniqueConstraint
 from datetime import datetime
 from util.database import Base,engine
 
diff --git a/PythonProject/schema/grade_schema.py b/PythonProject/schema/grade_schema.py
index 4d89cd4..a381ab9 100644
--- a/PythonProject/schema/grade_schema.py
+++ b/PythonProject/schema/grade_schema.py
@@ -1,5 +1,5 @@
 
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, field_validator
 
 
 class GradeRequest(BaseModel):
@@ -7,6 +7,18 @@ class GradeRequest(BaseModel):
     exam_order:int = Field(description='考核序次')
     score:float = Field(description='成绩')
 
+    @field_validator("score")
+    def check_score(cls, v):
+        if not (0 <= v <= 100):
+            raise ValueError("成绩必须在0~100之间")
+        return v
+
+    @field_validator("exam_order")
+    def check_exam_order(cls, v):
+        if v <= 0:
+            raise ValueError("考核序次必须大于0")
+        return v
+
 class GradeResponse(BaseModel):
     code: int = 200
     detail: str = 'OK'