High-heat-dissipation energy-saving heating cable

The utility model belongs to the technical field of heating cables, and particularly relates to a high-heat-dissipation energy-saving heating cable which comprises a central column, three supporting plates are evenly arranged on the central column in the circumferential direction, a guide layer wraps the supporting plates, the upper end of the guide layer is a heat conduction area, and the lower end of the guide layer is a heat resistance area. The three supporting plates and the guide layer form three cavities, a heat insulation sleeve is installed in the cavity at the lower end, a grounding wire is arranged in the heat insulation sleeve in a penetrating mode, heat conduction sleeves are installed in the other cavities, heating wires are arranged in the heat conduction sleeves in a penetrating mode, and the guide layer is wrapped with an insulation protection layer. The purpose is that the heating wire is arranged in the cavity at the upper end of the cable, and the lower end of the cable adopts the heat ins