diff --git a/game-server/app/services/guildActivity/guildActivityService.ts b/game-server/app/services/guildActivity/guildActivityService.ts
index 3f0457e2e..a46110aba 100644
--- a/game-server/app/services/guildActivity/guildActivityService.ts
+++ b/game-server/app/services/guildActivity/guildActivityService.ts
@@ -790,7 +790,11 @@ export async function getCityActivityGateHp(serverId: number, cityId: number) {
     let N = dicCityActivity.hpN;
 
     console.log(`getCityActivityGateHp:  gateHpBase ${gateHpBase}, N ${N}`);
-    let gateHp = Math.floor(gateHpBase * (activePlayerCnt/activeGuildCnt) * N);
+
+    let playerGuildRatio = activePlayerCnt/activeGuildCnt;
+    if(playerGuildRatio < 10) playerGuildRatio = 10;
+
+    let gateHp = Math.floor(gateHpBase * playerGuildRatio * N);
     console.log(`getCityActivityGateHp:  gateHp ${gateHp}`);