Efficient and high-quality natto family production, natto is a kind of health food originating from Japan, which is fermented from soybeans by natto bacteria. It has the functions of improving constipation, lowering blood lipids, lowering cholesterol, softening blood, preventing hypertension and arteriosclerosis. Compared with the use of natto machine, the method provided here has many advantages: 1, it can provide a better oxygen supply environment for natto fermentation, and the fermentation quality is good. 2, can produce one jin of dry beans or more at a time, high efficiency. 3, the use of traditional porcelain, container safety...