Cable insulation sheath cutting device

The utility model discloses a cable insulation skin cutting device which comprises a base, a workbench fixed to the base, a cutting knife hinged to the workbench, a clamping assembly installed on the workbench, a cutting lifting assembly installed on the base and a cutting assembly. The clamping assembly comprises a hoop fixed to the lower end of the workbench and a rotating shaft rotationally connected with the hoop, the shaft section, matched with the hoop, of the rotating shaft is an optical shaft, threads in opposite rotating directions are arranged on the two sides of the optical shaft on the rotating shaft respectively, and abutting blocks in threaded connection with the threaded shaft sections are arranged on the threaded shaft sections on the two sides respectively. The cutting depth of the blade can be stably adjusted through the lifting assembly, a cable can be conveniently aligned with the blade on the workbench through the clamping assembly, meanwhile, the cable can be clamped, the situation that