Inulin,a type of plant-derived natural fructan,can balance intestinal microorganism,regulate immune and lipid metabolism,and promote mineral absorption and so on. As a natural feed additive,inulin has the advantages of improving livestock's and poultry's intestinal health and immunity,which has a bright application prospect. In this paper,the physicochemical properties,extraction process,main physiological functions of inulin and application in livestock and poultry production were reviewed in order to provide references ...