Novel continuous circulation dual-purpose grain drying machine

The invention belongs to the technical field of grain drying, and particularly relates to a novel continuous circulation dual-purpose grain drying machine which comprises a drying machine body, a front air chamber, a rear air chamber, a cyclone separator and a fan. The dryer main body comprises a grain storage box; a plurality of groups of drying mechanisms are mounted at the bottom of the grain storage bin; the drying mechanism comprises a drying box and a tempering box, and the tempering box is located below the drying box; the drying box and the tempering box are arranged in multiple layers from top to bottom and are communicated with each other; a plurality of groups of air inlet assemblies are mounted in the drying box from top to bottom; an air outlet assembly is installed between every two adjacent air inlet assemblies. A cooling box is mounted at the bottom of the lowermost tempering box; a discharging box is mounted at the bottom of the drying box; a discharging hopper is mounted at the bottom of the