Dryer capable of achieving internal circulation drying

The utility model relates to the technical field of wood processing, in particular to a dryer capable of drying in an internal circulation mode, which comprises a bin body, a drying bin is installed in the bin body, blowing holes are formed in the top and the bottom of the drying bin, and communicating cavities are connected to the ends, away from the drying bin, of the blowing holes in the top and the bottom. The device comprises a drying bin, the left ends of the front portion and the rear portion of the drying bin are each provided with a left fixing bin, a servo motor is installed in the position, at the left end of the front portion, of the fixing bin, the right side of the servo motor is connected with a first conveying belt, and the right side of the first conveying belt is connected with a placement frame. By means of the device, the redundant overhead area of the bottom contact face of a wood board can be exposed as much as possible, the problem that the overall drying efficiency of the board can be