Using bentonite as additive to produce mixed feed can greatly improve the quality of final products. For one thing, bentonite has unique physical properties, which can promote the metabolism of animals and improve the conversion rate of feed. Therefore, animals have a strong appetite, rich fur and fast weight gain. And it is also beneficial for reducing feed costs. For another, due to excellent adsorption, it can effectively absorb coliform bacteria and enterotoxins of animals. So it plays a role in the prevention and control of epidemics, insecticide and sterilization.