diff --git a/model/model.go b/model/model.go
index fb36de5..299fdcf 100644
--- a/model/model.go
+++ b/model/model.go
@@ -54,7 +54,7 @@ type TokenInfo struct {
 type PrintInfo struct {
 	PrintNo string `json:"print_no" form:"print_no" binding:"required"` //打印机编号
 	Name    string `json:"name" form:"name"`                            //打印机备注
-	SIM     string `json:"sim" form:"sim"`                              //流量卡号码
+	//SIM     string `json:"sim" form:"sim"`                              //流量卡号码
 }
 
 type PagedInfo struct {
diff --git a/services/sim.go b/services/sim.go
index e9d1093..c9278ba 100644
--- a/services/sim.go
+++ b/services/sim.go
@@ -59,7 +59,8 @@ func SimFlowDaySettle() (err error) {
 					flowExpend.Flow, flowExpend.FlowUnit = putils.SplitFlowAndUnit(getCardInfoResult.CardFlow)
 				}
 			}
-			if flowExpend.Flow > 0 && flowExpend.FlowUnit != "" {
+			//可能有精度误差
+			if flowExpend.Flow > 0.1 && flowExpend.FlowUnit != "" {
 				err = dao.Insert(db, flowExpend)
 			}
 			//算是否超了一个月的流量了
diff --git a/utils/utils.go b/utils/utils.go
index cc5ac24..16b54d7 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -35,10 +35,10 @@ var (
 	letterBytes    = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
 	letterBytesNum = "0123456789"
 
-	flowUnitMap = map[string]string{
-		"KB": "KB",
-		"MB": "MB",
-		"GB": "GB",
+	flowUnitMap = map[string]struct{}{
+		"KB": struct{}{},
+		"MB": struct{}{},
+		"GB": struct{}{},
 	}
 )
 
@@ -216,8 +216,8 @@ func GetNextTimeFromList(now time.Time, timeList []string) (snapshotAt time.Time
 }
 
 func SplitFlowAndUnit(flowStr string) (flow float64, unit string) {
-	for _, v := range flowUnitMap {
-		if strings.Contains(flowStr, v) {
+	for k, _ := range flowUnitMap {
+		if strings.Contains(flowStr, k) {
 			return utils.Str2Float64WithDefault(flowStr[:len(flowStr)-2], 0), flowStr[len(flowStr)-2:]
 		}
 	}