Abstract: Dunaliella salina is a kind of very important algae resource.Because it had rich nutrient substances（protein,natural vitamin,minerals,unsaturated fatty acid,polysaccharide,etc.） and functions of anti-radiation,delaying the organism ageing,cancer prevention,anticancer,so it has wide exploration and utilization from the food health care,medicine,animal production and other aspects in recent years.As the receptor of biotechnology and gene engineering,it had an important role in the scientific research and has become a scientific research receptor in recent years.The biological characteristics,physiological research,toxicological research,nutritional research,bioactive components and their functions,the application of Dunaliella salina powder in animal production were reviewed,so as to promote the effective application of this kind of good feed resources in the livestock production in China.