diff --git a/internal/logic/app/group_app.go b/internal/logic/app/group_app.go
index adc41b7..f0d9994 100644
--- a/internal/logic/app/group_app.go
+++ b/internal/logic/app/group_app.go
@@ -174,6 +174,8 @@ func (*groupApp) DeleteMember(ctx context.Context, groupId int64, userId int64,
 	if err != nil {
 		return err
 	}
+
+	group.UserNum-- //群组人数减一
 	err = repo.GroupRepo.Save(group)
 	if err != nil {
 		return err
diff --git a/internal/logic/domain/group/model/group.go b/internal/logic/domain/group/model/group.go
index e4c5608..25d0441 100644
--- a/internal/logic/domain/group/model/group.go
+++ b/internal/logic/domain/group/model/group.go
@@ -93,6 +93,7 @@ func CreateGroup(userId, masterId int64, in *pb.CreateGroupReq) *Group {
 		Extra:             in.Extra,
 		Members:           make([]GroupUser, 0, len(in.MemberIds)+1),
 		IsAllMemberBanned: 2,
+		UserNum:           int32(len(in.MemberIds)) + 1,
 		CreateTime:        now,
 		UpdateTime:        now,
 	}