diff --git a/modules/viking/api_challengeover.go b/modules/viking/api_challengeover.go
index 023b709fc..1254e1a12 100644
--- a/modules/viking/api_challengeover.go
+++ b/modules/viking/api_challengeover.go
@@ -104,7 +104,7 @@ func (this *apiComp) ChallengeOver(session comm.IUserSession, req *pb.VikingChal
 		}
 	}
 
-	if viking.BossTime[key] > req.Report.Costtime {
+	if viking.BossTime[key] == 0 || viking.BossTime[key] > req.Report.Costtime {
 		viking.BossTime[key] = req.Report.Costtime
 		mapData["bossTime"] = viking.BossTime // 更新时间
 		this.module.CheckRank(session.GetUserId(), req.BossId, req.Difficulty, req.Report)