Cathode material hot air circulation drying box

The utility model discloses a positive electrode material hot air circulation drying box which comprises a box body, a frame body is arranged in the box body, and the frame body is provided with a drying trolley and a drying tray which are used for containing positive electrode materials. The three-way valve is arranged in the air inlet pipe, and a side pipe communicated with the three-way valve is arranged on one side of the air inlet pipe. According to the hot air circulation drying box for the positive electrode material, the three-way valve is arranged at the joint of the air inlet pipe and the side pipe, air inlet of the air inlet pipe or air inlet of the side pipe can be switched through the three-way valve, one side of the side pipe is connected with the vaporizer, and when the dried positive electrode material is cooled, liquid nitrogen in the liquid nitrogen tank can be vaporized into gas through the vaporizer; the vaporized cold dry gas enters the box body from the three-way valve through the side p