diff --git a/dao/teaDao.py b/dao/teaDao.py
new file mode 100644
index 0000000..15ae598
--- /dev/null
+++ b/dao/teaDao.py
@@ -0,0 +1,63 @@
+from sqlalchemy.exc import SQLAlchemyError
+from fastapi import HTTPException
+from model.teaModel import Teacher
+
+def get_teachers_limit_dao(p,n,db):
+    if p == 0 and n == 0:
+        r = db.query(Teacher).all()
+    else:
+        if p < 1:
+            p = 1
+        r = db.query(Teacher).offset((p-1)*n).limit(n).all()
+    return [ {'id':i.id,'t_name':i.t_name,'t_sex':i.t_sex,'t_age':i.t_age}  for i in r]
+
+
+def get_teachers_name_dao(name,db):
+    try:
+        r = db.query(Teacher).filter(Teacher.t_name==name).all()
+    except SQLAlchemyError as e:
+        db.rollback()
+        raise HTTPException(status_code=500, detail=f'查询失败:{str(e)}')
+    else:
+        return [ {'id':i.id,'t_name':i.t_name,'t_sex':i.t_sex,'t_age':i.t_age}  for i in r]
+
+def insert_teachers_dao(req,db):
+    try:
+        exist = db.query(Teacher).filter(Teacher.t_phone==req['t_phone']).first()
+        if exist:
+            raise HTTPException(status_code=400,detail='该手机号码已存在,不可重复使用')
+        t = Teacher(**req)
+        db.add(t)
+    except SQLAlchemyError as e:
+        db.rollback()
+        raise HTTPException(status_code=500,detail=f'添加失败:{str(e)}')
+    else:
+        db.commit()
+        return True,'添加成功'
+
+def update_teachers_dao(req,db,t_id):
+    try:
+        db.query(Teacher).filter(Teacher.id == t_id).update(req)
+    except SQLAlchemyError as e:
+        db.rollback()
+        raise HTTPException(status_code=500,detail=f'更新失败:{str(e)}')
+    else:
+        db.commit()
+        return True,'更新成功'
+
+def delete_teachers_dao(t_id,db):
+    try:
+        r = db.query(Teacher).filter(Teacher.id == t_id).all()
+        if not r:
+            raise HTTPException(status_code=404,detail='记录不存在')
+        for i in r:
+            if i.is_delete == 0:
+                db.query(Teacher).filter(Teacher.id == i.id).update({'is_delete':True})
+            else:
+                raise HTTPException(status_code=400,detail='该记录已删除，不可重复删除')
+    except SQLAlchemyError as e:
+        db.rollback()
+        raise HTTPException(status_code=500,detail=f'删除失败：{str(e)}')
+    else:
+        db.commit()
+        return True,'删除成功'