diff --git a/modules/arena/api_challengereward.go b/modules/arena/api_challengereward.go
index d1ccd7182..013ad88b2 100644
--- a/modules/arena/api_challengereward.go
+++ b/modules/arena/api_challengereward.go
@@ -111,6 +111,10 @@ func (this *apiComp) ChallengeReward(session comm.IUserSession, req *pb.ArenaCha
 		Isai:     false,
 	}
 
+	if red.Integral < 0 {
+		red.Integral = 0
+	}
+
 	if len(info.Record) > 10 {
 		info.Record = info.Record[1:]
 	}
@@ -131,9 +135,13 @@ func (this *apiComp) ChallengeReward(session comm.IUserSession, req *pb.ArenaCha
 			Defend:   rival.Defend,
 			Isai:     false,
 		}
+		if bule.Integral < 0 {
+			bule.Integral = 0
+		}
 		if len(rival.Record) > 10 {
 			rival.Record = rival.Record[1:]
 		}
+
 	} else {
 		bule = &pb.ArenaPlayer{
 			Dan: info.Dan,
@@ -142,6 +150,9 @@ func (this *apiComp) ChallengeReward(session comm.IUserSession, req *pb.ArenaCha
 			},
 			Integral: req.Aiintegral,
 		}
+		if bule.Integral < 0 {
+			bule.Integral = 0
+		}
 	}
 	this.module.modelArena.integralCompute(red, bule, req.Iswin)
 	if !req.Isai {