diff --git a/game-server/app/services/activity/gachaService.ts b/game-server/app/services/activity/gachaService.ts
index 6ab5527d6..e90a0496e 100644
--- a/game-server/app/services/activity/gachaService.ts
+++ b/game-server/app/services/activity/gachaService.ts
@@ -297,7 +297,8 @@ export class GachaPull {
             let isTarget = this.bigReward.id == gachaResult.contentId;
             if(++historyCount >= dicFloorCount || isTarget) {
                 if(hasGetFloor) { // 已经获得过一次保底了, 不给，换个给
-                    gachaResult.setContentId(getGachaContentOfHeroQuality(HERO_QUALITY_TYPE.PURPLE));
+                    let notBigReward = this.percent.filter(cur => cur.id != this.bigReward.id);
+                    gachaResult.setContentId(notBigReward[0].id, notBigReward[0].goodId);
                 } else {
                     gachaResult.setContentId(this.bigReward.id, this.bigReward.goodId);
                     hasGetFloor = true;