The product is patent one;it integrates advantages of various metal oven to improve its performance and possesses these characteristics,such as high heat efficacy,fuel saving(saving Above 2/5 by comparison with other variousovens),long service life,rapid temperature rising,stable temperature,not polluting melon seeds and food,convenient installation,and simple operation etc specially being suitable for form—ing complete set with dryer of melon seeds and food or drying cabinet.