Abstract: It is a new direction of the animal husbandry development to develop the alternative feed additive products for the antibiotics. Inulin is a kind of novel feed additive without residue.It is proved that the inulin can not only improve the production performance and enhance the immune function of livestock and poultry, but also can promote the absorption of minerals and improve the quality of meat product. Inulin has wide application prospect in animal production. The effect of inulin on animal production performance and its action mechanism were reviewed in this paper, so as to provide theoretical basis for the further development and extension of inulin as feed additive.