Plant polysaccharides as a natural plant component with multi-functional,plant polysaccharide has the characteristics of rich natural resource,high efficiency,no residue,non-drug resistance.As a green feed additive which can enhance the body immunity,improve the body resistance to disease and stress,but also regulate the microflora balance of the intestinal flora,improve the product quality.In this paper,we have summarized the structure and biological function of plant polysaccharides and its application in animal production,in order to provide...