Cable insulating layer coating device

The utility model discloses a cable insulating layer coating device which comprises a base, a coating machine body, a collecting tank, a cooling tower and a water storage tank are sequentially arranged on the top surface of the base from left to right, and a cylinder body capable of penetrating through a cable is arranged on the top surface of the base at the discharge port end of the coating machine body along the length direction of the base. A cooling pipe of a spiral structure is wound on the inner wall of the barrel in the axial direction of the barrel, a spray pipe communicated with the cooling pipe is further arranged on the top face, close to a discharging port of the wrapping machine body, of the barrel in a penetrating mode, a spray head is further arranged at the end of the bottom face of the spray pipe, and a collecting groove is connected to the top face, corresponding to the spray head, of the base. Water path conveying devices are arranged between the collecting tank and the cooling tower and b