The utility model discloses a cutter for removing insulation layer from a power cable, and has the structure that an inner and an outer sleeves are arranged at the inner and outer perisporiums of a flowing bearing, wherein, a bracket is arranged on the outer sleeve, and a handle with screw threads is arranged in the bracket hole. The handle is arranged in a circular groove on the shaft diameter of the hole in the hole, and the handle faces to top screws on the bracket. The bracket is also provided with a stop lever, the rod diameter with screw threads of the handle is provided with a cutter frame, a nick on one end of the handle is accommodated with the stop lever, and the other end of the handle with top screws is provided with a cutter block. The utility model has the advantages that the long depth can be cut by a fixed scale, the quality is ensured, the time and the labor can be saved in use, the operation is easy, the safety is high, the labor intensity is reduced, the size of the inner sleeve can be changed, and cables with different diameters can be cut. The utility model can also select a sliding bearing to reduce the cost.