The invention relates to the technical field of material processing devices, and discloses a material drying device. The material drying device comprises a rack and a drying box. A separation plate isarranged at a feeding port, a receiving plate and an object loading plate are arranged in the drying box, ventilation holes are formed in the receiving plate, a first wedge rod and a second wedge rodare arranged on the inner wall of the drying box, the wedge part of the first wedge rod abuts against an elastic plate, and a push plate is arranged in the drying box; a third spring is arranged at the bottom of the interior of the drying box, the end, away from the bottom, of the third spring abuts against the push plate, an air supply box is fixedly installed on the outer side of the drying box, a first guide pipe is arranged between the air supply box and a cavity in a communicating mode, and a cartridge valve abutting against the first wedge rod is arranged on the first guide pipe; a piston cylinder is fixedly installed on the outer side of the drying box, a second guide pipe is connected with the position, between the cartridge valve and the drying box, of the first guide pipe in a tapped mode, and the second guide pipe communicates with the piston cylinder; and a turbine is rotatably connected with the interior of the second guide pipe, a cam coaxial with the turbine is arrangedon the drying box, and the cam abuts against the separation plate. According to the material drying device, the problem that material drying is not even is solved, and meanwhile the drying efficiencyis improved.