The current study was carried out to assess the antioxidative expression of the CNC1 peanut cultivar in drought condition. The oxidative stress with a burst of O2.- and H2O2 in peanut leaves resulted the obviously cellular membrane damage that was illustrated by an increase of lipid peroxidation. A high induced activity of enzymatic antioxidants such as SOD, CAT and POX would detoxify the excess of O2.- and H2O2. An increase in content of amino acid proline protects the stressed cells by adjusting intercellular osmotic potential. The antioxidative expression of the CNC1 cutivar was similar to that in L20, a drought tolerant cutivar of peanut. Those results suggested the drought tolerant capability for cultivar CNC1.