diff --git a/game-server/app/services/gvg/gvgBattleService.ts b/game-server/app/services/gvg/gvgBattleService.ts
index 6b1a83042..b4ac76173 100644
--- a/game-server/app/services/gvg/gvgBattleService.ts
+++ b/game-server/app/services/gvg/gvgBattleService.ts
@@ -560,8 +560,9 @@ export async function calCityGuard(configId: number) {
 
     for(let [groupKey, cities] of sortCities) {
         let cityResult: number[] = [];
+        let index = 0;    // 防死循环，万一出什么事cityResult.length一直不等于cities.length
 
-        while(cityResult.length != cities.length) {
+        while(cityResult.length != cities.length && (++index < 1000)) {
             let sorted = cities
                 .filter(city => cityResult.indexOf(city.cityId) == -1)
                 .sort((a, b) => {