With the introduction of heat conduction oil circulation heating method,this machine features high efficient,power-saving,non-pollution on baking grain food including milk white,scarlet and groudnut in shell.The machine is conposed of oil-type fuel/coal reheating furnace,circulation pump,and baker.The heat energy is directly radiated on objects need to be baked from radiator fan in the baker ,and the object is continuously pushed by the flight which produce uninterrupted circulation to bring even heat to the peanut and ensure the baking quanlity of peanut