diff --git a/group/serializers.py b/group/serializers.py
index c38b30ff..73376595 100644
--- a/group/serializers.py
+++ b/group/serializers.py
@@ -33,15 +33,21 @@ class SimpleGroupSerializer(serializers.ModelSerializer):
     created_by = UsernameSerializer()
     password = serializers.SerializerMethodField()
     me = serializers.BooleanField()
+    members = UsernameSerializer(many=True)
 
     def get_password(self, obj):
         return obj.password != ""
 
     class Meta:
         model = Group
-        fields = ["id", "created_by", "name", "password", "me"]
+        fields = ["id", "created_by", "name", "password", "me", "members"]
 
 
 class JoinGroupSerializer(serializers.Serializer):
     group_name = serializers.CharField()
-    password = serializers.CharField(allow_blank=True)
\ No newline at end of file
+    password = serializers.CharField(allow_blank=True)
+
+
+class AddUserToGroupSerializer(serializers.Serializer):
+    group_id = serializers.IntegerField()
+    username = serializers.CharField()
diff --git a/group/urls/admin.py b/group/urls/admin.py
index 2a6780cf..89b96493 100644
--- a/group/urls/admin.py
+++ b/group/urls/admin.py
@@ -1,7 +1,8 @@
 from django.conf.urls import url
 
-from ..views.admin import GroupAPI
+from ..views.admin import GroupAPI, AddUserToGroupAPI
 
 urlpatterns = [
     url(r"^group/?$", GroupAPI.as_view(), name="group_api"),
+    url(r"^group/add_user?$", AddUserToGroupAPI.as_view(), name="add_user_to_group_api"),
 ]
diff --git a/group/views/admin.py b/group/views/admin.py
index 75f24074..a2b935c1 100644
--- a/group/views/admin.py
+++ b/group/views/admin.py
@@ -5,7 +5,7 @@ from account.models import User
 from utils.api import APIView, validate_serializer
 
 from ..models import Group
-from ..serializers import GroupSerializer, CreateGroupSerializer, EditGroupSerializer, DeleteGroupSerializer
+from ..serializers import GroupSerializer, CreateGroupSerializer, EditGroupSerializer, DeleteGroupSerializer, AddUserToGroupSerializer
 
 
 class GroupAPI(APIView):
@@ -68,3 +68,15 @@ class GroupAPI(APIView):
         else:
             group.members.remove(User.objects.get(id=data["user_id"]))
             return self.success(GroupSerializer(group).data)
+
+
+class AddUserToGroupAPI(APIView):
+    @validate_serializer(AddUserToGroupSerializer)
+    def post(self, request):
+        try:
+            user = User.objects.get(username=request.data["username"])
+            group = Group.objects.get(id=request.data["group_id"])
+        except Exception:
+            return self.error("用户不存在")
+        group.members.add(user)
+        return self.success(GroupSerializer(group).data)