diff --git a/setting/user_usable_group.go b/setting/user_usable_group.go
index fdf2f723..0ae132d0 100644
--- a/setting/user_usable_group.go
+++ b/setting/user_usable_group.go
@@ -3,14 +3,19 @@ package setting
 import (
 	"encoding/json"
 	"one-api/common"
+	"sync"
 )
 
 var userUsableGroups = map[string]string{
 	"default": "默认分组",
 	"vip":     "vip分组",
 }
+var userUsableGroupsMutex sync.RWMutex
 
 func GetUserUsableGroupsCopy() map[string]string {
+	userUsableGroupsMutex.RLock()
+	defer userUsableGroupsMutex.RUnlock()
+
 	copyUserUsableGroups := make(map[string]string)
 	for k, v := range userUsableGroups {
 		copyUserUsableGroups[k] = v
@@ -19,6 +24,9 @@ func GetUserUsableGroupsCopy() map[string]string {
 }
 
 func UserUsableGroups2JSONString() string {
+	userUsableGroupsMutex.RLock()
+	defer userUsableGroupsMutex.RUnlock()
+
 	jsonBytes, err := json.Marshal(userUsableGroups)
 	if err != nil {
 		common.SysError("error marshalling user groups: " + err.Error())
@@ -27,6 +35,9 @@ func UserUsableGroups2JSONString() string {
 }
 
 func UpdateUserUsableGroupsByJSONString(jsonStr string) error {
+	userUsableGroupsMutex.Lock()
+	defer userUsableGroupsMutex.Unlock()
+
 	userUsableGroups = make(map[string]string)
 	return json.Unmarshal([]byte(jsonStr), &userUsableGroups)
 }
@@ -47,11 +58,17 @@ func GetUserUsableGroups(userGroup string) map[string]string {
 }
 
 func GroupInUserUsableGroups(groupName string) bool {
+	userUsableGroupsMutex.RLock()
+	defer userUsableGroupsMutex.RUnlock()
+
 	_, ok := userUsableGroups[groupName]
 	return ok
 }
 
 func GetUsableGroupDescription(groupName string) string {
+	userUsableGroupsMutex.RLock()
+	defer userUsableGroupsMutex.RUnlock()
+
 	if desc, ok := userUsableGroups[groupName]; ok {
 		return desc
 	}