Two-stage Crusher, also known as two-stage non-screen bottom pulverizer, has upper and lower poles for crushing, and two sets of rotors connected in series. The material pulverized by the hammer head of the upper rotor is immediately crushed again by the hammer head of the lower rotor rotating at high speed, and crushed each other to achieve crushing. best effect. There is no sieve grate bottom, no strict requirements on the moisture content of the material, there is no problem of sticking the sieve plate, and there is no problem that the fine powder cannot be removed in time and repeated crushing; the crushing efficiency is high, and there is no invalid wear of the hammer head; The high-alloy wear-resistant hammer head does not need to be repaired after wear and tear. It can be used repeatedly in the mobile position, and one pair of hammer heads can be used three times. The structure of the whole machine is reasonable, easy to install and energy-saving and efficient. Widely used in municipal solid waste, distiller's grains, mushroom dregs, traditional Chinese medicine dregs, bricks, gravel, etc.