Corncob crushing mechanism

The invention discloses a corncob crushing mechanism which comprises an upper box, a lower box, a coarse powder mechanism, a fine powder mechanism and a suction mechanism. The coarse powder mechanism is mounted at the top of the lower box; the fine powder mechanism is mounted on the inner side of the lower box; the upper box is mounted on the top of the lower box; the suction mechanism is installed on the bottom of the fine powder mechanism; the coarse powder mechanism is composed of a driving rod and some alloy knives; the fine powder mechanism is composed of slender screws; the suction mechanism consists of a fan and a duct; one end of the duct is mounted on the bottom of the lower box; the other end is arranged in cooperation with the fan; the coarse powder mechanism and the fine powder mechanism are actuated by independent power mechanism. The corncob crushing mechanism has the advantages that working efficiency is high, the diameters of alloy knives on both sides of the driving rod are set to be smaller