Wood leftover material crushing device

The invention provides a wood leftover material crushing device. The wood leftover material crushing device comprises a main box body, a crushing assembly, a first filter plate, a first flow guide plate, a second flow guide plate, a crushing roller set, a second filter plate, a third flow guide plate and a cutting box, the crushing assembly, the first filter plate, the first flow guide plate, the second flow guide plate, the crushing roller set, the second filter plate and the third flow guide plate are installed in the main box body, and the cutting box is arranged on the side wall of the main box body. The crushing assembly comprises an air cylinder, a crushing plate and a limiting part, the first filtering plate is located below the crushing assembly, a plurality of filtering holes are formed in the end, away from the air cylinder, of the first filtering plate, and the first flow guide plate is correspondingly arranged below the filtering holes; the cutting box comprises a secondary box body and a cutter a