Gravel aggregate multi-stage crushing device

The utility model discloses a gravel aggregate multi-stage crushing device which comprises a box body, partition plates and a discharging plate are arranged in the box body at intervals to divide the box body into a crushing chamber, a grinding chamber and a dust collecting chamber from top to bottom in sequence, a feeding pipe is arranged on one side of the top of the box body, a rotating impeller is arranged in the crushing chamber, and a discharging pipe is arranged on the other side of the top of the box body. The inner top of the crushing chamber is arc-shaped, impact teeth are arranged on the inner top wall and the inner walls of the two sides of the crushing chamber, two sets of grinding rollers are arranged in the grinding chamber, a discharging opening is formed in one side of the bottom of the grinding chamber, a dust remover is arranged on one side of the box body, and a dust outlet pipe is arranged at the bottom of the dust remover and communicated with the interior of the dust collecting chamber.