The invention discloses a green environment-friendly power supply cable heat dissipation anti-icing device, including a machine body; a solar panel is arranged at the top of the machine body and a power pole is arranged at the bottom of the machine body; a control room, a temperature adjusting room and an air exhaust room are arranged inside the machine body; an air exhaust pipe is fixed outside the bottom of the machine body; a clamping pipe is fixed at the bottom end of the air exhaust pipe; a cable is arranged inside the clamping pipe; a heat conduction clamping pipe is arranged inside theclamping pipe; six contacts are arranged outside the heat conduction clamping pipe, and five channels are formed between the six contacts. The device is arranged on a power pole connected at both endsof a cable, solar energy is utilized to generate electricity for a hot air blower and an air cooler, hot air and cold air are generated through the working of the hot air blower or the air cooler, and the hot air and the cold air are transported into the channels through the two ends of the clamping pipe, and the air is transported to the proximal end, the middle end and the distal end in five channels, so that the uniform heating or heat dissipation of the whole cable is realized, the service life of the cable is prolonged, and the cable is not liable to be damaged.