diff --git a/README.md b/README.md
index 44357a2..e3a1f6f 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ home_place specialty（专业）、start_time（入职时间）\
 work_experience、collage、creat_date、update_date\
 is_delete、delete_time\
 2.学科表\
-字段名：name(科目名字)
+字段名：id，name(科目名字)
 **schema 请求体、响应体**\
 请求体：设置了两个，一个带自增组件用于查询\
 一个不带自增组件，新增用；\
diff --git a/Teachers/model/tea_model.py b/Teachers/model/tea_model.py
index 986d7fe..a5ef706 100644
--- a/Teachers/model/tea_model.py
+++ b/Teachers/model/tea_model.py
@@ -48,8 +48,12 @@ class Tea(Base):
 #科目表
 class Sub(Base):
     __tablename__ = 'subject'
+    id = Column(Integer
+                , primary_key=True
+                , nullable=False
+                , autoincrement=True
+                , comment='id')
     name = Column(String(50)
-                    , primary_key=True
                     ,nullable=False
                     ,comment='科目名字')