In the current study, we observed that the IUGR finishing pigs had increased concentrations of MDA and PC, and that the levels of the CAT, T-AOC, T-SOD, GSH-Px, and GSH were restored to the normal level of jejunal mucosa, indicating that IUGR-induced oxidative stress still exists in the jejunum of pigs during the fattening stage, but the antioxidant capacity was partly improved. Here, CAT is linked to fetal growth restriction.