diff --git a/server/wheelserver/api/v1/bag/bag.go b/server/wheelserver/api/v1/bag/bag.go
index 5a5ecc04..71bd0de1 100644
--- a/server/wheelserver/api/v1/bag/bag.go
+++ b/server/wheelserver/api/v1/bag/bag.go
@@ -78,6 +78,6 @@ func (this *BagApi) UseItem(c *gin.Context) {
 		return
 	}
 	service.Buff.Add(s.GetAccountId(), itemMeta.GetBuffList())
-	bagItem.DecItemNum(bagItem.ItemNum, int32(nowTime))
+	bagItem.DecItemNum(1, int32(nowTime))
 	c.JSON(200, rspObj)
 }