The invention discloses a high-voltage contact head carbon-dioxide-ice cleaning robot for an electric power high-altitude operation. The high-voltage contact head carbon-dioxide-ice cleaning robot comprises a transport base, a bottom stretching and contracting frame, at least one middle stretching and contracting frame and a carbon-dioxide-ice cleaning device, wherein the transport base comprisesa supporting platform, vehicle wheels and jacking-lifting oil cylinders, the bottom stretching and contracting frame is stretchably arranged on the supporting platform, the at-least-one middle stretching and contracting frame is stretchably arranged on the bottom stretching and contracting frame, and the carbon-dioxide-ice cleaning device is arranged on the at-least-one middle stretching and contracting frame; and the carbon-dioxide-ice cleaning device comprises a top supporting frame, a bearing plate, a six-shaft mechanical arm, a carbon-dioxide-ice ejector and an air compressor, wherein a probe of the six-shaft mechanical arm is provided with a carbon-dioxide-ice nozzle, an output connection mouth of the carbon-dioxide-ice ejector is connected with the carbon-dioxide-ice nozzle, the aircompressor is connected with the carbon-dioxide-ice ejector, and the carbon-dioxide-ice ejector is provided with a depth camera which is used for shooting the probe of the six-shaft mechanical arm. Bymeans of the above-mentioned manner, the carbon-dioxide-ice cleaning robot disclosed by the invention can automatically clean the high-voltage contact head and is high in safety, the phenomenon of getting an electric shock will not appear, the high-voltage contact head is cleaned by spraying the carbon-dioxide-ice, and the cleaning efficiency is made to be higher.