Abstract: Disclosed is a medium to large-sized cable peeling device, including a main component having a base, a cable support positioned on top of the base and a positioning frame positioned in the middle of the cable support; and a cutting assembly positioned below the positioning frame and in the middle of the cable support, the cutting assembly has an adjustment component positioned below the positioning frame, a cutting blade positioned at the bottom of the adjustment component, a locking component positioned inside the cutting blade and a rotating component positioned below the adjustment component and in the middle of the cable support. The invention achieves adjustment of cable peeling based on the thickness of the cable insulation by setting up a main component and a cutting assembly, which prevents damage to cable core during the cutting process and enables the blade to cut at an angle, thereby improving cutting efficiency.