The invention relates to a cable stripping device for high voltage live line work. The cable stripping device for high voltage live line work comprises a lifting rack, a bottom plate rack, an upper tool structure, left and right external long upper claws and left and right external long lower claws. The lifting rack is arranged above the bottom plate rack and the lifting rack and the bottom platerack are connected vertically via a vertical electric cylinder; the upper tool structure is located on the upper portion of the front portion of the lifting rack and hinged to the inner side of a lifting rack frame to form a double-connecting rod slider-crank mechanism with the lifting rack; the left external long lower claw and the left external long upper claw are hinged to the left outer side of the lifting rack frame and the right external long lower claw and the right external long upper claw are hinged to the right side of the lifting rack frame in pairs to form double acting connectingrod mechanisms with the lifting rack. The cable stripping device for high voltage live line work can automatically cut off cable insulation layers in live line work; cutting is completed at a time andmanual operation is not needed, so that the efficiency is high and the safety is great.