Dehumidification drying device for agricultural grain sieving

The invention discloses a dehumidification drying device for agricultural grain sieving. The dehumidification drying device comprises a feeding chamber, a dehumidification drying chamber, a sieving chamber and collecting chambers; a feeding opening is formed in the top of the feeding chamber; a fan is arranged in the feeding chamber and directly faces the feeding opening; multiple layers of separating plates II are arranged at the bottom of the fan in a staggered and inclined manner; the sieving chamber is arranged at the bottom of the feeding chamber without an interval; multiple layers of inclined sieves are arranged in the sieving chamber; the ends of the sieves are connected with the collecting chambers; and drying air provided by the dehumidification drying chamber flows in via an airoutlet at the bottom of the feeding chamber and flows out via an air inlet at the top. According to the dehumidification drying device, the retention time of grains is prolonged by the aid of separating plates I and the sepa