The invention discloses a PCB board drying device, comprising a power cord, a handle, a hinge, an observation window, a thermometer, a box door, a bracket, a box body, a first PCB placement board, a drying layer, a partition, an air-drying layer, a first Two PCB placement boards, a fan, a vent, a first card slot and a second card slot. The beneficial effects of the present invention are as follows: the present invention divides the box into a drying layer and an air-drying layer, which is beneficial for different PCB boards to be dried in the box due to different drying environments, and a fan and a ventilation port are installed on the top of the air-drying layer. , provides an air-drying environment for the air-drying layer, shortens the air-drying time, and improves the work efficiency. The first PCB placement board and the second PCB placement board are connected to the inside of the box by card slots, which are slidable, easy to clean, compact in structure, and can be installed and removed. It is convenient, improves efficiency, has good economic and social benefits, and is conducive to promotion.