The invention relates to a drying device, in particular to hot air circulation drying equipment for grain. The invention provides the hot air circulation drying equipment, which is simple in structure, rapid in temperature rise, small in temperature difference and easy in moisture removal, can be used for drying materials in a circulating way and generates circulating hot air, for grain. The equipment comprises a hot air box body, a material box body and a lifting device, and is characterized in that the hot air box body is formed by assembling movable plates, the material box body comprises agrain cabinet, a feeding device, a material conveying device, a discharge device, a polygonal box, a blanking adjustment device and a support, and the lifting device comprises a material adding box,a material collecting box, a material adding device, a circulating material lifting device, a material conveying main pipeline and a material push packing auger; the material box body is arranged in the hot air box body. The hot air circulation drying equipment for the grain is low in manufacturing cost, simple to operate, convenient to use and easy to popularize.