diff --git a/game-server/app/services/guildBossService.ts b/game-server/app/services/guildBossService.ts
index 074de73a4..52de6a7ae 100644
--- a/game-server/app/services/guildBossService.ts
+++ b/game-server/app/services/guildBossService.ts
@@ -215,6 +215,8 @@ export async function getBossHp(serverId: number, guildCode: string, dicBossBase
             playerCnt ++;
         }
     }
+    if(playerCnt == 0) return { ratio: 1, bossHp: zoomInDamage(minBossHp) };
+    
     let subCe = getBossSubAttrCe(dicWar.secondAttrLevel, bossLv)
     console.log(`getBossHp activeCe ${activeCe} playerCnt ${playerCnt} subCe ${subCe}`);
     let B = (activeCe/playerCnt/6 - subCe)/GUILDACTIVITY.GATEACTIVITY_ENEMYCE;