diff --git a/worker/nowcar/ddf.go b/worker/nowcar/ddf.go
index 12d1278..1d1d40a 100644
--- a/worker/nowcar/ddf.go
+++ b/worker/nowcar/ddf.go
@@ -82,6 +82,9 @@ func (d *Ddf) getDetail(shopId int) {
 			if m1 != nil {
 				continue
 			}
+			if useMinute > 100 || useMinute < 0 {
+				useMinute = 0
+			}
 			m1 = new(model.Ddf)
 			m1.Day = time.Now().Format("2006-01-02")
 			m1.ShopName = shopName