Aspergillus niger is a probiotic fungus distributed in food, plant products and soil all over the world. Aspergillus niger is an important fermentation industry strain, which can produce amylase, acid protease, cellulase, hemicellulase, pectinase, paeoniflorin oxidase, lipase, citric acid, gluconic acid, etc. Used in food fermentation industry, fermented feed, biological fertilizer production, etc., it can also be directly added to feed. In the biological fertilizer industry, Aspergillus niger has the effect of cracking macromolecular organic matter and insoluble inorganic matter, which is convenient for crops to absorb and utilize, improve soil structure, enhance soil fertility, and increase crop yield. This product is suitable for solid fermentation.