Schizochytrium limacinum is rich in nutritional value,especially essential fatty acids such as DHA required for animal growth,so it has good application prospects in animal production.The basic nutritional value and biologically active substances of Schizochytrium limacinum were reviewed,and the influence of environmental factors on the production of Schizochytrium limacinum DHA was analyzed.The application of Schizochytrium limacinum in improving the growth performance and survival rate of animals,increasing the nutritional value of products,and promoting the fat metabolism and improving non-specific immunity of the body was reviewed.The application prospects of Schizochytrium limacinum in animal feed and additives were prospected, aiming to provide reference for the development and application of Schizochytrium limacinum.