The invention discloses grain drying and dedusting equipment comprising a drying device, a dedusting device and a dust suction device; the drying device comprises a sealing box and a resistance wire heating block, and a groove in a slope at the inner side of the sealing box is internally provided with the resistance wire heating block; the dedusting device comprises a motor, a shell, a cylindrical roller and an inner container, the inner container is arranged inside the shell, and the cylindrical roller is arranged between the shell and the inner container; and the dust suction device comprises a ventilating tower and a dust collector, the inner side of the ventilating tower is provided with two parallel baffles, and a dust suction pipe communicates with the dust collector by a main dust suction pipe. The equipment disclosed by the invention comprises the drying device, the dedusting device and the dust suction device; a conveying belt is adopted in the drying device to prolong the time of grains in the drying device, so that not only is the automation realized, but also the grains are kept to be completely dried; the motor is adopted in the dedusting device to stir the inner container, so that the dried dust falls off from the grains; and the dedusted grains enter the dust suction device, and the scattered dust is sucked by the dust collector, so that the aims of drying and dedusting are achieved.