Multi-stage dustproof crusher

The utility model discloses a multistage dustproof crusher, which comprises a box body and a cone body rotatably connected with the box body, the cone body comprises a cone core and an extrusion cone body sleeved on the cone core, the upper side of the extrusion cone body penetrates through the top wall of the box body, and a sealing assembly is arranged between the top wall of the box body and the extrusion cone body. A driving mechanism for driving the cone to rotate is arranged at the top of the box body; a rotating seat is arranged at the bottom of the cone body, the rotating seat is connected with the extrusion cone body in a clamped mode, a sealing gasket is arranged between the rotating seat and the extrusion cone body, and a pressurizing mechanism used for pressurizing the interior of the extrusion cone body is arranged in the rotating seat; multi-stage dust prevention is achieved through the sealing assembly, the sealing gasket and the pressurizing mechanism, and the dust prevention rate is improved.