Novel crushing bin

The utility model discloses a novel crushing bin which comprises a cylindrical crushing bin body, a main shaft, hammer knives, a motor, a conveying pipeline and a feeding port. A main shaft is fixedlyconnected into the crushing bin; the spindle is concentric with the central axis of the crushing bin; the spindle is provided with a plurality of hammer knives; the main shaft and the motor are assembled and connected through a belt wheel and a belt; one side of the crushing bin is sealed, and the other side is fixedly connected with the air bin; fan blades are arranged in the air bin; an outletof the air bin is communicated with the conveying pipeline; an outlet of the conveying pipeline is communicated with the material funnel; a screen bottom is arranged below the main shaft and the hammer cutters; the screen bottom is a semi-cylindrical body; the screen bottom is movably connected with the crushing bin, and the minimum distance between the screen bottom and the hammer knife is adjustable and ranges from 2 cm