diff --git a/dao/im.go b/dao/im.go
index b976795..b0c980c 100644
--- a/dao/im.go
+++ b/dao/im.go
@@ -274,6 +274,6 @@ func FindGroupUsers(group_id int) []GroupUser {
 
 func FindGroupByNameLike(groupName string) []Group {
 	var groups []Group
-	DB.Debug().Where("group_name like ?", "%"+groupName+"%").Find(&groups)
+	DB.Debug().Where("group_name like ?", "%"+groupName+"%").Limit(20).Find(&groups)
 	return groups
 }
diff --git a/service/imService.go b/service/imService.go
index 3eb2f7b..0e5ab18 100644
--- a/service/imService.go
+++ b/service/imService.go
@@ -66,6 +66,12 @@ func CreateGeneralMessageService(from_id, to_id, msg_type, group_id int, content
 		err, id = dao.CreateGeneralMessage(from_id, to_id, msg_type, 0, group_id, content)
 	case proto.MSG_TYPE_GROUP_ADD:
 		//加入群聊请求
+		//判断是否在群里
+		groupUser := dao.FindGroupUser(from_id, group_id)
+		if len(groupUser) > 0 {
+			return errors.New("已在群里"), 0
+		}
+		err, id = dao.CreateGeneralMessage(from_id, to_id, msg_type, 0, group_id, content)
 
 	case proto.MSG_TYPE_GROUP_INVI:
 		//邀请加群，直接加入