diff --git a/services/sim.go b/services/sim.go
index cdf4098..3bf57e9 100644
--- a/services/sim.go
+++ b/services/sim.go
@@ -52,8 +52,10 @@ func SimFlowDaySettle() (err error) {
 						} else {
 							if sumExpend, err := dao.GetSimFlowExpendSum(db, v.IccID, monthBegin, monthEnd); err == nil {
 								cardFlow := putils.Flow2KB(putils.SplitFlowAndUnit(getCardInfoResultMonth.CardFlow))
-								fmt.Println("11111111111111111111", cardFlow, sumExpend.Flow)
 								flowExpend.Flow, flowExpend.FlowUnit = putils.FlowKB2Other(cardFlow - sumExpend.Flow)
+								if flowExpend.Flow < 0 {
+									err = fmt.Errorf("流量计算有问题！")
+								}
 							}
 						}
 					}