diff --git a/src/models/busi_group.go b/src/models/busi_group.go
index 677512c7..f3cf22d3 100644
--- a/src/models/busi_group.go
+++ b/src/models/busi_group.go
@@ -1,6 +1,7 @@
 package models
 
 import (
+	"fmt"
 	"time"
 
 	"github.com/pkg/errors"
@@ -173,7 +174,17 @@ func (bg *BusiGroup) AddMembers(members []BusiGroupMember, username string) erro
 
 func (bg *BusiGroup) DelMembers(members []BusiGroupMember, username string) error {
 	for i := 0; i < len(members); i++ {
-		err := BusiGroupMemberDel("busi_group_id = ? and user_group_id = ?", members[i].BusiGroupId, members[i].UserGroupId)
+		num, err := BusiGroupMemberCount("busi_group_id = ? and user_group_id <> ?", members[i].BusiGroupId, members[i].UserGroupId)
+		if err != nil {
+			return err
+		}
+
+		if num == 0 {
+			// 说明这是最后一个user-group，如果再删了，就没人可以管理这个busi-group了
+			return fmt.Errorf("The business group must retain at least one team")
+		}
+
+		err = BusiGroupMemberDel("busi_group_id = ? and user_group_id = ?", members[i].BusiGroupId, members[i].UserGroupId)
 		if err != nil {
 			return err
 		}
diff --git a/src/webapi/config/i18n.go b/src/webapi/config/i18n.go
index 7f49d303..437e3f06 100644
--- a/src/webapi/config/i18n.go
+++ b/src/webapi/config/i18n.go
@@ -2,43 +2,44 @@ package config
 
 var (
 	dict = map[string]string{
-		"just a test":                                  "这只是一个测试",
-		"just a test: %s":                              "这只是一个测试: %s",
-		"InternalServerError":                          "系统内部错误，请联系管理员",
-		"Username or password invalid":                 "登录失败，请检查用户名和密码",
-		"Username is blank":                            "用户名不能为空",
-		"Username has invalid characters":              "用户名含有非法字符",
-		"Nickname has invalid characters":              "昵称含有非法字符",
-		"Phone invalid":                                "手机号格式非法",
-		"Email invalid":                                "邮箱格式非法",
-		"Incorrect old password":                       "旧密码错误",
-		"Username already exists":                      "用户名已存在",
-		"No such user":                                 "用户不存在",
-		"Note has invalid characters":                  "备注含有非法字符",
-		"UserGroup already exists":                     "用户组已存在，不能重复创建",
-		"No such UserGroup":                            "用户组不存在",
-		"No such BusiGroup":                            "业务组不存在",
-		"BusiGroup already exists":                     "业务分组已存在，不能重复创建",
-		"Some UserGroup id not exists":                 "有些用户组ID不存在",
-		"Some alert mutes still in the BusiGroup":      "业务组下仍然存在告警屏蔽配置，不能删除",
-		"Some dashboards still in the BusiGroup":       "业务组下仍然存在监控大盘配置，不能删除",
-		"Some collect rules still in the BusiGroup":    "业务组下仍然存在采集规则配置，不能删除",
-		"Some alert rules still in the BusiGroup":      "业务组下仍然存在告警规则配置，不能删除",
-		"Some alert subscribes still in the BusiGroup": "业务组下仍然存在订阅规则配置，不能删除",
-		"Some targets still in the BusiGroup":          "业务组下仍然存在监控对象，不能删除",
-		"Some recovery scripts still in the BusiGroup": "业务组下仍然存在自愈脚本，不能删除",
-		"Name is blank":                                "名称不能为空",
-		"Name has invalid characters":                  "名称含有非法字符",
-		"Dashboard already exists":                     "监控大盘已存在",
-		"No such dashboard":                            "监控大盘不存在",
-		"AlertRule already exists":                     "告警规则已存在，不能重复创建",
-		"No such AlertRule":                            "告警规则不存在",
-		"CollectRule already exists":                   "采集规则已存在，不能重复创建",
-		"No such metric description":                   "该指标释义不存在，可能已被删除",
-		"No such TargetQuery":                          "查询条件不存在，可能已被删除",
-		"No permission. Only admins can assign BG":     "没有权限！只有管理员才能分配业务组",
-		"No permission to operate the targets: %s":     "没有权限操作这些监控对象：%s",
-		"No permission. You are not admin of BG(%s)":   "没有权限操作，您并非业务组(%s)的管理员",
+		"just a test":                                      "这只是一个测试",
+		"just a test: %s":                                  "这只是一个测试: %s",
+		"InternalServerError":                              "系统内部错误，请联系管理员",
+		"Username or password invalid":                     "登录失败，请检查用户名和密码",
+		"Username is blank":                                "用户名不能为空",
+		"Username has invalid characters":                  "用户名含有非法字符",
+		"Nickname has invalid characters":                  "昵称含有非法字符",
+		"Phone invalid":                                    "手机号格式非法",
+		"Email invalid":                                    "邮箱格式非法",
+		"Incorrect old password":                           "旧密码错误",
+		"Username already exists":                          "用户名已存在",
+		"No such user":                                     "用户不存在",
+		"Note has invalid characters":                      "备注含有非法字符",
+		"UserGroup already exists":                         "用户组已存在，不能重复创建",
+		"No such UserGroup":                                "用户组不存在",
+		"No such BusiGroup":                                "业务组不存在",
+		"BusiGroup already exists":                         "业务分组已存在，不能重复创建",
+		"Some UserGroup id not exists":                     "有些用户组ID不存在",
+		"Some alert mutes still in the BusiGroup":          "业务组下仍然存在告警屏蔽配置，不能删除",
+		"Some dashboards still in the BusiGroup":           "业务组下仍然存在监控大盘配置，不能删除",
+		"Some collect rules still in the BusiGroup":        "业务组下仍然存在采集规则配置，不能删除",
+		"Some alert rules still in the BusiGroup":          "业务组下仍然存在告警规则配置，不能删除",
+		"Some alert subscribes still in the BusiGroup":     "业务组下仍然存在订阅规则配置，不能删除",
+		"Some targets still in the BusiGroup":              "业务组下仍然存在监控对象，不能删除",
+		"Some recovery scripts still in the BusiGroup":     "业务组下仍然存在自愈脚本，不能删除",
+		"Name is blank":                                    "名称不能为空",
+		"Name has invalid characters":                      "名称含有非法字符",
+		"Dashboard already exists":                         "监控大盘已存在",
+		"No such dashboard":                                "监控大盘不存在",
+		"AlertRule already exists":                         "告警规则已存在，不能重复创建",
+		"No such AlertRule":                                "告警规则不存在",
+		"CollectRule already exists":                       "采集规则已存在，不能重复创建",
+		"No such metric description":                       "该指标释义不存在，可能已被删除",
+		"No such TargetQuery":                              "查询条件不存在，可能已被删除",
+		"No permission. Only admins can assign BG":         "没有权限！只有管理员才能分配业务组",
+		"No permission to operate the targets: %s":         "没有权限操作这些监控对象：%s",
+		"No permission. You are not admin of BG(%s)":       "没有权限操作，您并非业务组(%s)的管理员",
+		"The business group must retain at least one team": "业务组下要保留至少一个团队",
 	}
 	langDict = map[string]map[string]string{
 		"zh": dict,