Abstract: Response of plant antioxidant enzymes to supplementary UV-B radiation and combined stresses is one of the crucial mechanisms to resist stress.Based on recent researches at home and abroad,effects of UV-B radiation on gene expression, transcription and translation of plant antioxidant enzymes were summarized; responses of plant antioxidant enzymes to combined stresses between UV-B radiation and drought,ozone,high temperature,salt,heavy metal and acid rain were also analyzed;impacts of regulatory factors,such as carbon dioxide,ascorbic acid,α-NAA, selenium,laser radiation and rare earths,on plant antioxidant enzymes were outlined as well.