The invention relates to the field of cable cleaning, in particular to a cable surface cleaning device which comprises a base, side plates are fixedly mounted at the left end and the right end of the upper surface of the base, a top plate is fixedly mounted between the tops of the two side plates, a connecting plate is fixedly mounted between the two side plates, and two symmetrical cable placement frames are placed at the top of the base. The ends, close to each other, of the two side plates are sequentially provided with bearing seats, drying mechanisms and flushing mechanisms from top to bottom, the ends, away from each other, of the two side plates are fixedly provided with water tanks, the water tanks communicate with the flushing mechanisms on the corresponding sides, water inlet hoppers are arranged at the tops of the water tanks, and cylinders are rotationally connected into the bearing seats; the outer surface of the cylinder is sleeved with a cable reel, a driven bevel gear is detachably installed at the end, away from the bearing seat, of the cylinder, a motor is fixedly installed at the top of the top plate, and a rotating shaft is fixedly installed at the output end of the motor. The mechanism is compact, and the problems that the cable surface cleaning effect is poor and the efficiency is low are solved.