Cable insulation layer cutting device and cutting method

The invention discloses a cable insulation layer cutting device and method. The device comprises a rack, and a lifting table, two second rolling shafts, two second rolling shafts and a sliding block are sequentially installed on the rack from top to bottom. The two second rolling shafts are arranged side by side, and the distance between the two second rolling shafts is larger than the width of the transverse cutter rest, the diameter of the milling cutter and the width of the annular cutter. The lifting table is driven by a linear motor to move up and down, a transverse knife rest is slidably installed on the lifting table, the lower end of the transverse knife rest is connected with a transverse knife through a bolt, a plurality of threaded holes are formed in the lower end of the transverse knife rest, and transverse cutters of different lengths can be installed. When the transverse cutter rest moves downwards, the transverse cutter can be driven to penetrate through the gap between the two second rolling