Power transmission cable deicing system

The invention relates to the technical field of cable deicing, in particular to a power transmission cable deicing system which adopts laser to cut ice from the top in cooperation with knocking from bottom to top, prevents a power transmission cable from bearing the ice, and is quicker and more thorough in deicing. Comprising a walking vehicle and a plurality of walking wheels. The device further comprises a controller, a laser mechanism and a knocking mechanism, the controller is divided into a remote part and a ground station, the remote part is installed on the walking vehicle, the remote part and the ground station are in wireless communication, the laser mechanism emits laser beams, and the energy density of the laser beams can melt cable coating ice without damaging a cable. Laser beams emitted by the laser mechanism cut ice from the top of the power transmission cable, the ice disintegrates and falls under the action of self weight and pressure of water vapor, the knocking mechanism is installed on the