Scrap steel crusher is a new type of scrap steel crushing production line, which consists of heavy shredder, vertical scrap steel crusher, conveying and separation equipment. The machine casing of this scrap steel crushing production line is made of extra-thick steel plate. The inner lining is made of high-manganese cast steel, which is strong and durable. The main shaft is made of forged parts and then heat-treated. Casting, built-in S-blade, train wheel hub forging hammer head between cutter heads. The casing of the host machine adopts a hydraulic cover lifting device, which is convenient and fast for maintenance. The feeding slope is equipped with a super-powerful double-barrel feeding device, which is positioned one high and one low and rotates in the same direction. It can gradually flatten large pieces of loose material and send it into the machine. The rotation speed of the drum determines the feeding speed. It is controlled by the load current feedback of the motor of the host to realize automatic adjustment to ensure that the host is in the optimal load state. After the unbreakable material enters the machine body, the operator opens the discharge door and discharges it out of the machine body, so as not to damage the waste steel crushing production line. The whole machine has obvious advantages such as generous and reasonable design, compact structure, simple and convenient operation, stable performance, and large output. Can also be reasonably improved according to user requirements.