The invention discloses a high-tension cable de-icing machine which comprises a split type box. A de-icing high-tension cable penetrates through the box along a semicircular hole, a de-icing mechanism is arranged at one end of the box, and the de-icing mechanism comprises a geared motor, a driving gear and a driven gear, wherein the driving gear and the driven gear are meshed with each other. The driven gear is formed by combining two semicircular gears, and tools are arranged on the end face of the driven gear. A walking driving mechanism and a gear motor are arranged in the box, and an output shaft of the gear motor is connected with driving chain wheels and driven chain wheels through chains. Each driven chain path shaft is sleeved with a polyurethane wheel, and the polyurethane wheels are pressed on the high-tension cable to be de-iced to move forward in a rolling mode along the cable. The high-tension cable de-icing machine further comprises remote video collecting equipment, a lifting mechanism and a pressurizing mechanism. After the de-icing machine is hung on the cable through an insulating rod, a lower box body is driven by the lifting mechanism to be combined together with an upper box body, and the box can achieve the function of fixing other parts and the function of supporting. The de-icing machine is compact in structure, small in size, low in weight and suitable for working high above the ground.