The invention discloses a hot air drying room, and relates to the field of drying equipment. The hot air drying room comprises a box body, a guide mechanism, a dynamic conveying device and a circulating conveying device, wherein the dynamic conveying device comprises a frame body, a sliding mechanism, a driving mechanism, a plurality of material conveying mechanisms, a plurality of locking adjusting assemblies and a plurality of transmission mechanisms; and the plurality of material conveying mechanisms are sequentially installed on the frame body from top to bottom, the middle of each material conveying mechanism is rotationally installed on the frame body, one end of each material conveying mechanism is installed on the frame body through one locking adjusting assembly, every two adjacent material conveying mechanisms are connected through one transmission mechanism, the material conveying directions of every two adjacent material conveying mechanisms are opposite, and the feeding end of the lower material conveying mechanism in every two adjacent material conveying mechanisms is located at the outer side of the discharging end of the upper material conveying mechanism. According to the hot air drying room, the influence of a non-uniform flow field on material drying is reduced, the automation of material drying is realized, and the working efficiency is improved.