The utility model relates to a composite insulator cleaning device. The composite insulator cleaning device comprises a cleaning disk, cleaning cloth, and handle rods which are fixedly connected with the cleaning disk, wherein the cleaning disk consists of two semicircular annular plates which are moveably connected with each other through a hinge; the two handle rods are respectively fixed to the upper end surfaces of the two semicircular annular plates vertically; the cleaning cloth is arranged on the lower end surfaces and the inner annular surfaces of the two semicircular annular plates. According to the composite insulator cleaning device, composite insulators of various voltage levels are conveniently cleaned by electrical equipment maintenance personnel.