Abstract: Antioxidant strains were screened from 36 lactic acid bacteria isolated from longevity elderly faces, and the oxidative damage model of small intestinal epithelial cells (IEC-6) was established by hydrogen peroxide (H₂O₂) to investigate the effects of the screened strains on the oxidative stress of IEC-6 cells. The results showed that that strains of HN-04, HN-05 and HN-15 had higher antioxidant capacity in vitro, and the scavenging capacity of DPPH radical, hydroxyl radical and superoxide anion radical of the three strains were 52.18%~57.16%, 47.44%~52.38% and 37.11%~43.31%. The adhesion rates of the strains to IEC-6 cells were 6.77%, 6.92% and 5.82%, respectively. With the intervention effects of the stains, the survival rate of IEC-6 cells was increased by 5.31%~11.19%, and the activities of glutathione peroxidase (GSH-PX), superoxide dismutase (SOD), catalase (CAT) and total antioxidant capacity (T-AOC) in cells were increased by 12.03%~32.39%, 21.20%~47.42%, 36.10%~87.14% and 23.55%~48.69%, respectively. In addition, the contents of malondialdehyde (MDA) in oxidative damaged IEC-6 cells were decreased by 20.98%~48.80% under the treatment with the strains. In summary, the three strains screened in this research could reduce oxidative stress injury of IEC-6 cells, and could be used as natural antioxidants in the development of functional foods.