diff --git a/worldsrv/welfmgr.go b/worldsrv/welfmgr.go
index d5891f9..9ea3150 100644
--- a/worldsrv/welfmgr.go
+++ b/worldsrv/welfmgr.go
@@ -3,7 +3,6 @@ package main
 import (
 	"fmt"
 	"math"
-	"strconv"
 	"time"
 
 	"mongo.games.com/goserver/core/logger"
@@ -1936,8 +1935,7 @@ func (this *WelfareMgr) UpdateDiamondBankData(p *Player, coinNum int64, isWin bo
 		addDiamond = float64(coinNum) * float64(LoseCoinRate) / 10000000
 	}
 	//保留小数点后4位
-	diamondStr := fmt.Sprintf("%.4f", addDiamond)
-	addDiamond, _ = strconv.ParseFloat(diamondStr, 64)
+	addDiamond = math.Round(addDiamond*10000) / 10000
 	p.WelfData.DiamondBank.BankDiamond += addDiamond
 	pool := srvdata.PBDB_PigBank_DiamondMgr.Datas.GetArr()
 	infoData := pool[0]