Negative pressure pneumatic type grain crop crushing and conveying system

The utility model relates to a negative pressure pneumatic type grain crop smashing and conveying system, which belongs to the technical field of grain conveying equipment and comprises a vibrating screen, a discharging end of the vibrating screen is connected with a feeding end of a storage bin, a discharging end of the storage bin is connected with a feeding end of a screw conveyor, and a discharging end of the screw conveyor is connected to a negative pressure air pipe. An air inlet is formed in the outer wall of one end of the negative pressure air pipe located below the discharging end of the spiral conveyor, the upper end of the negative pressure air pipe extends to the feeding end of the pulverizer, and the discharging end of the bottom end of the pulverizer is connected to a pulse type bag-type dust collector at the upper end of the storage bin through an air pipe. According to the system, the high-pressure fan is adopted for suction, negative pressure is formed in a system pipeline, grains pass throu