The invention discloses a water dripping resistant protective cover of service conductor. The protective cover can prevent the situation that rainwater flows to the wall along a service conductor andthe wall is soaked by water. Moreover, the structure is simple, and the installation is convenient. The protective cover comprises a rubber sleeve. The rubber sleeve sleeves a service conductor. The inner surface is tightly adhered on the outer surface of the service conductor. The protective cover also comprises at least one circular water baffling plate arranged on the external surface of the rubber sleeve.