Using the seeds of ‘Dongsheng’ cabbage as material,we investigated seed germination characteristics,changes in relative electric conductivity,MDA content,soluble protein and soluble sugar contents and antioxidant related indexes during artificial aging at 40℃ and RH 100%.The results showed(1):The seed moisture content and abnormal seedling rate after germination increased considerably with the increase of aging time,but the seed germination rate,germination potential,germination index and vigor index decreased;(2)The relative electrolyte leakage and soluble sugar content increased and soluble protein content decreased;The contents of malondialdehyde (MDA) firstly went up and then went down;(3)With the increase of the aging time,SOD,POD and CAT activities decreased significantly.The ascorbate peroxidase (APX) activities increased considerably after 2 d aging,and decreased after 6 d aging.In conclusion,during artificial aging treatment,the seed vitality and the germination rate decreased significantly,and the relative electrolyte leakage，soluble protein content and soluble sugar content is positively correlative with seed vigor index.The increased peroxidation of membrance lipids may also be the main mechanism for deterioration of ‘Dongsheng’ cabbage seeds during artificial aging.