diff --git a/class_management/model/class_management_model.py b/class_management/model/class_management_model.py
index b4f1567..e8fae9a 100644
--- a/class_management/model/class_management_model.py
+++ b/class_management/model/class_management_model.py
@@ -1,14 +1,10 @@
-
 from sqlalchemy import Column, Integer, String, Date, ForeignKey
 from sqlalchemy.dialects.mysql import DATETIME
 from datetime import datetime
 from database import Base
 
-
-
-
 class ClassInfo(Base):
-    __tablename__ = 'classes_management'
+    __tablename__ = 'class'
 
     id = Column(Integer
                 ,primary_key=True
@@ -25,18 +21,15 @@ class ClassInfo(Base):
                         )
     head_teacher_id = Column(Integer
                             ,ForeignKey('teacher.id')
-                            ,nullable=False
                             ,comment='班主任编号'
                             )
 
     coach_teacher_id = Column(Integer
                               ,ForeignKey('teacher.id')
-                              ,nullable=False
                               ,comment='授课老师编号'
                               )
     tutor_teacher_id = Column(Integer
                               ,ForeignKey('teacher.id')
-                              ,nullable=False
                               ,comment='助教老师编号'
                               )
     # class_teacher = Column(String(50)
@@ -48,11 +41,9 @@ class ClassInfo(Base):
     #                         ,comment='授课老师'
     #                         )
     class_start_time = Column(Date
-                              ,nullable=False
                               ,comment='开班日期'
                               )
     class_end_time = Column(Date
-                            ,nullable=False
                             ,comment='结课日期'
                             )
     is_delete = Column(Integer