diff --git a/rule/mw/mw_db.go b/rule/mw/mw_db.go
index 5b4d6d3..f1b692b 100644
--- a/rule/mw/mw_db.go
+++ b/rule/mw/mw_db.go
@@ -38,6 +38,12 @@ func GetMasterId(baseDb *xorm.Engine, c *gin.Context) (masterId string) {
 				masterId = svc.GetWebSiteDomainMasterId(baseDb, md.PLATFORM_PC, c.Request.Host)
 			}
 		}
+		if masterId == "" && c.GetHeader("Platform") == "" { // 无平台访问
+			hostList := strings.Split(c.Request.Host, ".")
+			if isNumeric(hostList[0]) {
+				masterId = hostList[0]
+			}
+		}
 	}
 	fmt.Println("master_id:::::::", masterId)
 	return