Multi-stage crushing device for mining raw materials

The utility model discloses a mining raw material multi-stage smashing device which comprises a shell, and a temporary storage cavity and a smashing cavity are formed in the shell. The crushing mechanism comprises a crushing table arranged in the crushing cavity, a rotating shaft is fixedly connected to the upper end of the middle of the crushing table, the upper end of the rotating shaft is rotationally connected with the inner top of the crushing cavity, a crushing groove is formed in the inner bottom of the crushing cavity, and a first protruding block layer is arranged on the outer side of the bottom part of the crushing table. A second bump layer matched with the first bump layer is arranged on the inner wall of the crushing groove; the driving mechanism is used for driving the grinding mechanism; and the opening and closing mechanism is used for controlling discharging. According to the crushing device, a sealed feeding opening is adopted, diffusion of crushed dust is greatly reduced, and cleanliness an