This machine uses coal (also can be made into electric heating type, fuel oil or gas infrared catalytic combustion type) as the heat source, and uses the principle of heat conduction radiation to roast the material; the roasted object does not touch the firework during the roasting process. The medium to be baked material is continuously pushed by the spiral piece in the drum to form an uninterrupted rolling, so that it is evenly heated which effectively guarantees the baking quality, color and taste.