The invention relates to a high-voltage cable stripping device, which comprises a stripping mechanism, wherein the stripping mechanism comprises a first clamping block and a second clamping block; a clamping opening for clamping a cable is formed between the first clamping block and the second clamping block; a drive mechanism drives the first clamping block and the second clamping block to be close to each other or far away from each other and the clamping opening is reduced or enlarged; a stripping cutter is arranged at the side of the clamping opening formed between the first clamping blockand the second clamping block; an insulating rod is connected with the stripping mechanism; and a rotary mechanism drives the stripping mechanism to rotate. According to the high-voltage cable stripping device, a to-be-stripped high-voltage cable is clamped into the clamping opening formed between the first clamping block and the second clamping block in actual stripping operation, the drive mechanism is started to implement clamping of the cable, and the rotary mechanism is started to implement cutting and stripping operation of the cable by using the stripping cutter, so that automatic operation is achieved by the stripping device and the operation efficiency is improved; and furthermore, the cables of different diameters can be stripped, so that the applicability of the cable strippingdevice is improved.