The machine base of large metal crusher is wide at the top and narrow at the bottom, with good stability. The internal structure of the machine is a shaft connecting 4-7 fixed cutter heads. The fixed cutter is S-shaped, which can be turned over for use twice. The fixed cutter has the functions of forced feeding and forced crushing in the metal crusher. The hammer head of the metal crusher is forged from the train wheel steel, with good density, economy and durability. In the process of crushing, the metal material rotates with the hammer head as it moves rapidly. After a short time of hammering, the finished particles flow out of the bottom screen and pass through