The invention discloses a drying device for saw dust recovery. The drying device comprises a shell, a first feed inlet, a conveying belt, a second drying chamber and a stirring chamber. A support base is arranged at the bottom of the shell. The first feed inlet communicates with a first drying chamber through the shell. A drying roller is arranged in the first drying chamber and is connected with a motor. The conveying belt is fixed in the shell. A warm air machine is fixedly installed in the second drying chamber. A stirring shaft is arranged in the stirring chamber and is connected with the motor. By forming the first feed inlet and a second feed inlet, saw dust of different humidity can be classified and treated, the saw dust of high humidity enters the first drying chamber and the second drying chamber to be treated through the first feed inlet, the saw dust of low humidity directly enters the second drying chamber through the second feed inlet, compared with the single treatment mode of the prior art, drying is more even, the effect is better, and work efficiency is improved greatly.