Particle screening device for production of compound vitamin premix

The utility model discloses a particle screening device for production of a compound vitamin premix. The particle screening device comprises a screening tank, the screening assembly is arranged in the screening tank and comprises a baffle. A discharge port I and a discharge port II; a blanking port; a filter screen; at least one air guide pipe; a plurality of tuyeres I; a cyclone separator I; a cyclone separator II; the reverse blowing assembly is arranged in the screening cavity II; the reverse blowing assembly comprises an air guide pipe II; and a plurality of tuyeres II. According to the particle screening device used in the production of the compound vitamin premix, materials can be screened into two batches of materials with different particle sizes through the screening assembly, and then the materials are discharged through the discharging opening I and the discharging opening II; a small amount of materials attached to the filter screen are reversely blown away through the reverse blowing assembly, th