Plant polysaccharides are a type of active substances with a variety of biological functions. As functional feed additives, they are widely used in modern animal husbandry. They have many biological functions, such as promoting growth, enhancing immunity, improving intestinal health, and improving the quality of livestock products. learning function. As a multifunctional natural plant ingredient, plant polysaccharides have the characteristics of wide sources, no residues in livestock and poultry bodies and livestock products, and no resistance to antibiotics. Research and development of them as new feed additives can help reduce the use of antibiotics and improve livestock production. Product safety is of great significance in promoting the sustainable development of modern animal husbandry.