Abstract: There are rich nutrients ingredients and bioactivator in Moringa oleifera. The antioxidant function of Moringa oleifera has become a hot spot hotspots in Moringa oleifera research and development in recent years. The oxidative stress in living organisms leads to aging and chronic diseases. As a natural antioxidant,Moringa oleifera slow this damage. This paper summarizes the antioxidant components of polysaccharides,polyphenols and vitamins in Moringa oleifera,and the extraction method,content distribution and antioxidant mechanism of those components. The evaluation methods on antioxidant activity of Moringa oleifera include in vitro evaluation method such as DPPH,ABTS,FRAP,TRAP,ORAC and in vivo evaluation method(eg. SOD,CAT,GPx,GST). At last,the development trends on antioxidant activity of Moringa oleifera are proposed. The study provides a reference for the deep research and development of antioxidant active ingredients and methods in Moringa oleifera.