Coffee bean baking device

A coffee bean baking device comprises a machine body, a rolling barrel, a heating unit, a transmission unit and an air-sucking unit, wherein the machine body is provided with an outer shell and an inner shell arranged inside the outer shell, an air inlet passage is formed between the outer shell and the inner shell and is provided with an inlet and an outlet, the inlet is formed in the outer shell, the outlet is formed in the inner shell, the rolling barrel can be arranged inside the inner shell in a rotary mode, the heating unit is arranged inside the inner shell and located below the rolling barrel, the transmission unit is used for driving the rolling barrel to rotate, and the air-sucking unit is arranged outside the machine body and is used for guiding air into the machine body through the inlet and sucking the air inside the rolling barrel to the outside of the machine body. Therefore, heat energy dissipated through the outer shell of the machine body can be effectively reduced, and people are prevented