The four-shaft shredder is driven by a power system to rotate four dynamic knife rotors at low speed. The blades tear, shear, and compress materials between each other for crushing, and achieve a smaller output size through screen control. With a unique four-rotor structure and innovative blade technology, it features a large crushing chamber, high crushing ratio, and can control crushed materials to smaller sizes through screens. Equipped with intelligent control technology, it delivers effective crushing results for both soft and hard materials.