The ability of oligomeric procyanidins from lotus seedpod (LSOPC) to inhibit oxidation in bulk rapeseed oil was studied.The results showed that 0.02% LSOPC was equal to 0.02% BHT in inhibiting the oxidation of rapeseed oil.However,0.10% LSOPC was less than 0.02% TBHQ.The acid value varied from 0.99 to 1.19,and the carotenoid content（β-carotene equivalent）reduced from 48.4 μg/g to 0.99 μg/g.The white index(WI) of oil increased by 24.50 reaching upto 26.82.Oleic acid,linoleic acid and lenolenic acid were significantly changed from 50.78×104 mg/kg,15.60×104 mg/kg and 5.71×104 mg/kg to 44.54×104 mg/kg,13.39×104 mg/kg and 4.49×104 mg/kg,respectively.