Based on the removal of insulating layers by CO2 lasers, the shielding layer material of cables is removed by YAG lasers, and the theoretical model of YAG laser peeling of metallic materials is established. The process of laser peeling of materials is simulated and analyzed by ANSYS software, and the experimental parameters are determined. With the experiment of YAG laser peeling of the shielding layers of RG113 cables, the influence rules of laser power, scanning speed, pulse width and defocusing distance on the incision width, the incision depth and the surface quality are obtained. With the range analysis of the orthogonal tests, the influences of different process parameters on the incision width and depth are studied. The results show that the laser power has the greatest impact on the incision width, the incision depth of insulating layers and the incision depth of the metallic shielding layer, while the laser scanning speed has the greatest impact on the incision width of the metallic shielding layer.