diff --git a/app/mix/service/apiservice.go b/app/mix/service/apiservice.go
index 8e32b2ed..388cfce7 100644
--- a/app/mix/service/apiservice.go
+++ b/app/mix/service/apiservice.go
@@ -3656,7 +3656,7 @@ func (s *Service) ApiCreateRavenIQTest(ctx *gin.Context, req *Raven_IQ_testproto
 
 	// 计算智商
 	totalScoreLowerBound := list[scoreBlockIdx]
-	totalScoreUpperBound := list[scoreBlockIdx+1]
+	totalScoreUpperBound := list[scoreBlockIdx+1] - 1
 	IQLowerBound := float64(IQResultMpcfg.Map[IQBlockId].IQLowerBound)
 	IQUpperBound := float64(IQResultMpcfg.Map[IQBlockId].IQUpperBound)
 	IQ := int64(math.Ceil(float64(totalScore-totalScoreLowerBound)/float64(totalScoreUpperBound-totalScoreLowerBound)*(IQUpperBound-IQLowerBound) + IQLowerBound))