The invention discloses a wire stripping device used for electric power. The wire stripping device comprises a subsection, wherein the subsection comprises two semicircular branched passages; ends are arranged at the positions, close to the right ends, of the outer circles of the branched passages; two guide grooves are symmetrically formed in the inner walls of the ends; a knife rest is movably arranged inside the ends; guide bars matched with the guide grooves are arranged on two sides of the knife rest; a through hole is formed in the front end face of the knife rest; a blade for cutting skin is arranged under the knife rest; two regulating tanks are symmetrically formed in the outer walls of the ends; a bolt is arranged between the two regulating tanks in a matched manner; and the bolt passes through the through hole. The device disclosed by the invention is relatively simple in structure and relatively low in cost, and is applicable for popularization and application.