The crushing chamber adopts an advanced teardrop-shaped design, equipped with secondary crushing tooth plates and an air intake device at the shaft end. It changes the movement direction of the materials, effectively disrupts the circulation layer, ensures thorough crushing of the materials, accelerates the sieving of small particles, reduces the temperature of the crushing chamber, and thereby increases the output of this series of crushers. The motor base is integrally milled and the rotor is dynamically balanced, which makes the crusher have less vibration, lower noise, more stable operation and higher efficiency. Fully open operation doors and safety interlock devices to ensure the safety and convenience of opening the door; The interlocking screening mechanism makes the replacement operation of the screen plates more convenient and reliable. The application of new materials such as tungsten carbide extends the service life of vulnerable parts in crushing, such as hammer pieces and screen pieces