Sieving and drying device for grain dryer

The invention discloses a sieving and drying device for a grain drying machine, and relates to the technical field of sieving and drying, the sieving and drying device comprises a sieving main body and a base plate, and the inner walls, away from each other, of the sieving main body are fixedly connected with cushion blocks. Large-particle impurities in the grains are filtered into the first impurity collecting box, the grains and fine-particle impurities enter the second screening box through the transition hopper to be screened for the second time, the fine-particle impurities are filtered into the second impurity collecting box, the grains enter the grain collecting box to be collected, and the grains are screened twice; according to the sieving and drying device for the grain drying machine, large-particle substances and fine-particle substances in grains are removed, the grains are effectively dried, and the sieving pressure is relieved through the transition hopper, so that the sieving and drying device