diff --git a/groups/admin.py b/groups/admin.py
index 18f51cd9..3e69d267 100644
--- a/groups/admin.py
+++ b/groups/admin.py
@@ -10,4 +10,11 @@ class GroupAdmin(admin.ModelAdmin):
     def formfield_for_manytomany(self, db_field, request, **kwargs):
         if db_field.name == "members":
             kwargs["queryset"] = s_models.Partment.objects.filter(iscompany=1,deletemark=1)
-        return super().formfield_for_manytomany(db_field, request, **kwargs)
\ No newline at end of file
+        return super().formfield_for_manytomany(db_field, request, **kwargs)
+
+@admin.register(models.Groupmember)
+class GroupmemberAdmin(admin.ModelAdmin):
+    def formfield_for_foreignkey(self, db_field, request, **kwargs):
+        if db_field.name == "member":
+            kwargs["queryset"] = s_models.Partment.objects.filter(iscompany=1,deletemark=1)
+        return super().formfield_for_foreignkey(db_field, request, **kwargs)
\ No newline at end of file
diff --git a/groups/migrations/0003_auto_20191024_1056.py b/groups/migrations/0003_auto_20191024_1056.py
new file mode 100644
index 00000000..7b723403
--- /dev/null
+++ b/groups/migrations/0003_auto_20191024_1056.py
@@ -0,0 +1,31 @@
+# Generated by Django 2.1.5 on 2019-10-24 10:56
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('safesite', '0281_remove_companyinfo_liaison_fax'),
+        ('groups', '0002_auto_20191017_0929'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Groupmember',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+            ],
+        ),
+        migrations.AddField(
+            model_name='groupmember',
+            name='group',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='groups.Group'),
+        ),
+        migrations.AddField(
+            model_name='groupmember',
+            name='member',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='safesite.Partment'),
+        ),
+    ]
diff --git a/groups/migrations/0004_auto_20191024_1109.py b/groups/migrations/0004_auto_20191024_1109.py
new file mode 100644
index 00000000..4f15b44a
--- /dev/null
+++ b/groups/migrations/0004_auto_20191024_1109.py
@@ -0,0 +1,18 @@
+# Generated by Django 2.1.5 on 2019-10-24 11:09
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('groups', '0003_auto_20191024_1056'),
+    ]
+
+    operations = [
+        migrations.RenameField(
+            model_name='group',
+            old_name='members',
+            new_name='member',
+        ),
+    ]
diff --git a/groups/migrations/0005_remove_group_member.py b/groups/migrations/0005_remove_group_member.py
new file mode 100644
index 00000000..d72f809e
--- /dev/null
+++ b/groups/migrations/0005_remove_group_member.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.1.5 on 2019-10-24 11:11
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('groups', '0004_auto_20191024_1109'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='group',
+            name='member',
+        ),
+    ]
diff --git a/groups/migrations/0006_group_members.py b/groups/migrations/0006_group_members.py
new file mode 100644
index 00000000..6076ee27
--- /dev/null
+++ b/groups/migrations/0006_group_members.py
@@ -0,0 +1,19 @@
+# Generated by Django 2.1.5 on 2019-10-24 11:20
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('safesite', '0285_remove_companyinfo_liaison_fax'),
+        ('groups', '0005_remove_group_member'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='group',
+            name='members',
+            field=models.ManyToManyField(through='groups.Groupmember', to='safesite.Partment'),
+        ),
+    ]
diff --git a/groups/models.py b/groups/models.py
index 64459f5f..01689d7c 100644
--- a/groups/models.py
+++ b/groups/models.py
@@ -11,8 +11,7 @@ class Group(models.Model):
     groupname = models.CharField(max_length=128, unique=True)
     type = models.CharField(max_length=32, choices=grouptype, default="集团")
     createtime = models.DateTimeField(auto_now_add=True)
-    members = models.ManyToManyField(s_models.Partment)
-
+    members = models.ManyToManyField(s_models.Partment,through='Groupmember')
     def __str__(self):
         return self.groupname
 
@@ -21,6 +20,10 @@ class Group(models.Model):
         verbose_name="集团"
         verbose_name_plural="集团"
 
+class Groupmember(models.Model):
+    group = models.ForeignKey(Group,on_delete=models.CASCADE)
+    member = models.ForeignKey(s_models.Partment,on_delete=models.CASCADE)
+
 class GroupUser(models.Model):
     username = models.CharField(max_length=128, unique=True)
     password = models.CharField(max_length=256)
diff --git a/safesite/migrations/0281_remove_companyinfo_liaison_fax.py b/safesite/migrations/0281_remove_companyinfo_liaison_fax.py
new file mode 100644
index 00000000..a32fe6fe
--- /dev/null
+++ b/safesite/migrations/0281_remove_companyinfo_liaison_fax.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.1.5 on 2019-10-24 10:56
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('safesite', '0280_auto_20191023_1711'),
+    ]
+
+    operations = [
+        # migrations.RemoveField(
+        #     model_name='companyinfo',
+        #     name='liaison_fax',
+        # ),
+    ]
diff --git a/safesite/migrations/0282_remove_companyinfo_liaison_fax.py b/safesite/migrations/0282_remove_companyinfo_liaison_fax.py
new file mode 100644
index 00000000..8829e0ca
--- /dev/null
+++ b/safesite/migrations/0282_remove_companyinfo_liaison_fax.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.1.5 on 2019-10-24 11:09
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('safesite', '0281_remove_companyinfo_liaison_fax'),
+    ]
+
+    operations = [
+        # migrations.RemoveField(
+        #     model_name='companyinfo',
+        #     name='liaison_fax',
+        # ),
+    ]
diff --git a/safesite/migrations/0283_remove_companyinfo_liaison_fax.py b/safesite/migrations/0283_remove_companyinfo_liaison_fax.py
new file mode 100644
index 00000000..95023475
--- /dev/null
+++ b/safesite/migrations/0283_remove_companyinfo_liaison_fax.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.1.5 on 2019-10-24 11:11
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('safesite', '0282_remove_companyinfo_liaison_fax'),
+    ]
+
+    operations = [
+        # migrations.RemoveField(
+        #     model_name='companyinfo',
+        #     name='liaison_fax',
+        # ),
+    ]
diff --git a/safesite/migrations/0284_remove_companyinfo_liaison_fax.py b/safesite/migrations/0284_remove_companyinfo_liaison_fax.py
new file mode 100644
index 00000000..317341e6
--- /dev/null
+++ b/safesite/migrations/0284_remove_companyinfo_liaison_fax.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.1.5 on 2019-10-24 11:13
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('safesite', '0283_remove_companyinfo_liaison_fax'),
+    ]
+
+    operations = [
+        # migrations.RemoveField(
+        #     model_name='companyinfo',
+        #     name='liaison_fax',
+        # ),
+    ]
diff --git a/safesite/migrations/0285_remove_companyinfo_liaison_fax.py b/safesite/migrations/0285_remove_companyinfo_liaison_fax.py
new file mode 100644
index 00000000..9d7b4a7e
--- /dev/null
+++ b/safesite/migrations/0285_remove_companyinfo_liaison_fax.py
@@ -0,0 +1,17 @@
+# Generated by Django 2.1.5 on 2019-10-24 11:20
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('safesite', '0284_remove_companyinfo_liaison_fax'),
+    ]
+
+    operations = [
+        # migrations.RemoveField(
+        #     model_name='companyinfo',
+        #     name='liaison_fax',
+        # ),
+    ]