Abstract: To evaluate the photooxidation resistance of different peanut varieties and provide a basis for selecting varieties with wide-adaptability, in this study, we used natural condition of high temperature and，high light in summer as photooxidation stress to identify the photooxidation resistance of different peanut varieties. The results showed that in 2015, 8 photooxidation resistant varieties were screened out, accounting for 6.67% of the total, medium resistant varieties accounted for 87.5% and non-resistant varieties 5.83%. In 2017, 45 varieties were selected from samples in 2015 and evaluated. There were 3 varieties, accounting for 6.67% of the total, as tolerant peanut varieties, 51.11% as medium tolerant and 44.22% as non-resistant varieties. There were significant differences in relative chlorophyll contents among peanut varieties with different photooxidation tolerance levels, and the relative chlorophyll contents of different tolerance levels in 2017 were significantly lower than that in 2015. The peanut varieties with obvious photooxidation-resistant differences were obtained, indicating that this method was reliable for evaluating photooxidation resistance of peanut varieties. Moreover the processing time of photooxidation stress should be considered comprehensively according to the temperature and light intensity and research objectives.