diff --git a/rule/appreciation.go b/rule/appreciation.go
index 86c1df5..06db8c3 100644
--- a/rule/appreciation.go
+++ b/rule/appreciation.go
@@ -49,7 +49,7 @@ func DealTransferIn(session *xorm.Session, amount float64) (err error, value flo
 		return
 	}
 	nowValueF := decimal.NewFromFloat(nowValue)
-	value, _ = amountValue.Div(nowValueF).Float64()
+	value, _ = amountValue.Div(nowValueF).RoundFloor(4).Float64()
 	return
 }