The invention relates to a tool used in the process of manufacturing a cable intermediate head or a terminal head in a power system and in particular relates to a cable joint insulating cladding stripper. The cable joint insulating cladding stripper comprises an upper clamp head, a lower clamp head, an upper clamp handle, a lower clamp handle and a pin shaft, and is characterized in that a longitudinal cutter is arranged on the upper clamp head or the lower clamp head; a semicircular cable positioning groove is formed in the lower clamp head or the upper clamp head; an upper transverse cutter and a lower transverse cutter are respectively arranged on the front end faces of the upper clamp head and the lower clamp head; the upper transverse cutter and the lower transverse cutter are relatively matched with each other; the upper transverse cutter and the lower transverse cutter are correspondingly provided with semicircular grooves with sawtooth-shaped cutting edges. The ring cutting and longitudinal cutting functions are integrated, and the cable joint insulating cladding stripper has the function of adjusting the size of the cutting edges so as to adapt to different models of cables and has the advantages of simplicity in operation, high working efficiency and convenience to carry.