To investigate the effect of 962 capsule, a TCM compound recipe, on liver peroxidation and weight of thymus and spleen (thymus index, spleen index) in aged rats, and observe the anti-oxidation effect and the influence on immunological function in rats.Rats were divided into young control, aged model, positive control (piracetam), 962 middle (0.9 g/kg) dose and high dose (1.8 g/kg) groups, and the medicated rats used in each group were aged rats. All tested drugs were administered for 1 month by gastrogavage. The liver peroxidation was determined by thiobarbituric acid method. The thymus index and spleen index were determined by weighing method.Middle and high dose of 962 capsule attenuated liver peroxidation, their liver MDA lowered, increased the thymus index of aged rats. There was no effect on spleen index in all medicated groups.962 capsule could reduce liver lipid peroxidation and increase thymus index. It is suggested that 962 capsule might be beneficial in retarding aging process.