diff --git a/rule/self_buy_global.go b/rule/self_buy_global.go
index 5039432..c36741d 100644
--- a/rule/self_buy_global.go
+++ b/rule/self_buy_global.go
@@ -47,10 +47,13 @@ func AddOrder(eg *xorm.Engine, req map[string]string) {
 			if zhios_order_relate_utils.StrToFloat64(max.OtherPrice) > 0 {
 				num := int(zhios_order_relate_utils.StrToFloat64(max.OtherPrice) / onemoney)
 				leave = zhios_order_relate_utils.StrToFloat64(max.OtherPrice) - onemoney*float64(num)
+				if leave < 0 {
+					leave = 0
+				}
 			}
 			nowMoney := leave + price*capitalPoolMul
 			nowNum := int(nowMoney / onemoney)
-			max.Num = nowNum
+			max.Num += nowNum
 			max.LeavePrice = zhios_order_relate_utils.Float64ToStrByPrec(zhios_order_relate_utils.StrToFloat64(max.LeavePrice)+zhios_order_relate_utils.StrToFloat64(req["price"]), 3)
 			max.OtherPrice = zhios_order_relate_utils.Float64ToStrByPrec(zhios_order_relate_utils.StrToFloat64(max.OtherPrice)+zhios_order_relate_utils.StrToFloat64(req["price"]), 3)
 			max.UpdateTime = time.Now()