Abstract:Excessive free radicals accelerate the body's aging and cause a variety of diseases， to maintain the balance of the body remove the excess antioxidant free radicals is needed. The potential hazards of chemical an－ tioxidants， natural antioxidants have become research emphasis. Coixenolide has antioxidant activity， its active ingredients are mainly coix seed oil， coix seed polysaccharide， coix seed oil peptide and so on. In the study of antioxidant activity of coix lacryma， the active ingredient can remove free radicals， repair cell damage. In this paper， the methods of extraction and application of coix seed oil， coix seed polysaccharide and coix seed oil peptides were reviewed， provide foundation for the development of coix seed antioxidant products.