diff --git a/server/marketserver/api/v1/recharge/recharge.go b/server/marketserver/api/v1/recharge/recharge.go
index f5cdc9f2..c9e513bd 100644
--- a/server/marketserver/api/v1/recharge/recharge.go
+++ b/server/marketserver/api/v1/recharge/recharge.go
@@ -13,6 +13,7 @@ import (
 	"q5"
 	"strings"
 
+	"math/big"
 	"github.com/gin-gonic/gin"
 )
 
@@ -165,8 +166,13 @@ func (this *RechargeApi) internalBuy(c *gin.Context,
 		}
 	}
 	srcPrice := q5.ToInt64(goodsMeta.GetPrice()) * q5.ToInt64(goodsNum)
-	price := q5.PowInt64(10, currencyMeta.GetCurrencyDecimal()) * srcPrice
-	if price <= 0 || price < q5.ToInt64(goodsMeta.GetPrice()) {
+	bnPrice := big.NewInt(0)
+	{
+		var i, e = big.NewInt(10), big.NewInt(currencyMeta.GetCurrencyDecimal())
+		i.Exp(i, e, nil)
+		bnPrice = i.Mul(i, big.NewInt(srcPrice))
+	}
+	if bnPrice.Cmp(big.NewInt(0)) < 0 || bnPrice.Cmp(big.NewInt(q5.ToInt64(goodsMeta.GetPrice()))) < 0 {
 		f5.RspErr(c, 3, "server internal error")
 		return
 	}
@@ -184,7 +190,7 @@ func (this *RechargeApi) internalBuy(c *gin.Context,
 		"order_id":         orderId,
 		"account_address":  accountAddress,
 		"passport_address": passportAddress,
-		"amount":           q5.ToString(price),
+		"amount":           bnPrice.String(),
 		"currency_name":    currencyContractMeta.GetName(),
 		"currency_address": currencyContractMeta.GetAddress(),
 	}
@@ -223,7 +229,7 @@ func (this *RechargeApi) internalBuy(c *gin.Context,
 				currencyContractMeta.GetAddress(),
 				goodsMeta.GetId(),
 				itemNum,
-				price,
+				bnPrice.String(),
 				srcPrice,
 				diamond,
 				presentDiamond,
diff --git a/server/marketserver/service/recharge.go b/server/marketserver/service/recharge.go
index 65043737..428f7dae 100644
--- a/server/marketserver/service/recharge.go
+++ b/server/marketserver/service/recharge.go
@@ -10,7 +10,7 @@ import (
 func AddRechargeOrder(orderId string, shortOrderId string,
 	netId int32, accountAddress string, passportAddress string,
 	currencyAddress string, currencyName string, itemId int32, itemNum int32,
-	price int64, srcPrice int64, diamond int64, presentDiamond int64, email string) bool {
+	price string, srcPrice int64, diamond int64, presentDiamond int64, email string) bool {
 	ok := false
 	nowTime := f5.GetApp().GetRealSeconds()
 	fields := [][]string{
@@ -23,7 +23,7 @@ func AddRechargeOrder(orderId string, shortOrderId string,
 		{"currency_address", currencyAddress},
 		{"item_id", q5.ToString(itemId)},
 		{"item_num", q5.ToString(itemNum)},
-		{"price", q5.ToString(price)},
+		{"price", price},
 		{"diamond", q5.ToString(diamond)},
 		{"present_diamond", q5.ToString(presentDiamond)},
 		{"return_contribution", q5.ToString(srcPrice * 1)},