Ulva prolifera extract consisted of polysaccharides,proteins,amino acids,fatty acids,volatile substances, minerals,and so on. They have many functions,such as anti-oxidation,improving immune response and hypolipidemic potential,and consequently have great potential for the application as feed additive. In this paper,the major chemical composition of Ulva prolifera extract,as well as their biological function and potential application as feed additive were reviewed in order to prov...