The surface structure optimization of the high-chrome liner is an important feature of its design, which aims to further improve the crushing efficiency and extend the service life. To cope with the good impact and wear of the impact crusher under a high-load working environment, the designer optimized the surface morphology of the liner and adopted a special concave-convex structure design. This concave-convex structure can not only enhance the impact effect between the material and the liner but also produce more cutting and extrusion effects during the material impact process, to achieve more effective material crushing.Specifically, the concave-convex structure can increase the contact area between the material and the liner, so that the material can obtain higher impact energy when in contact, enhance the transmission efficiency of the crushing force, and thus improve the crushing effect. The design also helps the material to be more evenly distributed during the crushing process, avoiding excessive wear at a single point, thereby extending the service life of the liner. In addition, the concave-convex structure design also has a self-cleaning effect, which can effectively reduce material blockage and adhesion and maintain the efficient operation of the equipment.