The scrap shredder is a professional machine which can tear and process large-scale solid scrap materials to the required size. The machine can tear the scrap into small segments for easy sorting and transportation. Effective utilization of scrap steel. It is mainly used to tear up scrap steel, scrap iron, automobile shell and other metal materials. It can reduce the size of bulk materials by shearing, tearing and extrusion, increase its packing density for easy transportation and recycling. The machine is mainly composed of a tearing blade group, a bearing box, a box support, a feeding system, a power system and an electrical control system. Material enters the tear box through the feeding system. The tear blade is loaded on the box. Material is teared into small pieces by the tear blade, extrusion, shearing and other comprehensive effects, and discharged from the lower part of the box. The characteristics of low noise, low energy consumption and high output of scrap shredder fully reflect the superiority of low speed and large torque shearing design. By shearing, tearing and extrusion, the size of materials, the thickness of cutters and the number of claws can be reduced and replaced according to different materials. When the hollow material is torn, it can be equipped with a pressing device to increase production. Low speed operation, noise and dust can achieve higher environmental standards.