以24月龄SD大鼠为对象，观察参芪合剂（由党参、黄芪、何首乌组成）对动物体重，摄食，产热量，心脏功能及脑单脸氧化酶-B（MAO－B），红血细胞超氧化物歧化酶（SOD）活力的影响。结果表明，服用参芪一定时间后，脑中MAO－B活力明显降低。红血细胞SOD活力显著升高。老龄机体在不增加体重的情况下产热率及耐寒能力明显提高。心脏功能得到加强。提示参芪合剂具有较好的抗衰老作用。 The 24-month-old SD rats were used to observe the body weight, food intake, caloric production, heart function, brain single-face oxidase-B (MAO-B), red blood cells of Shenqi Mixture (composed of Dangshen, Radix Astragali, Polygonum multiflorum). The effect of superoxide dismutase (SOD) activity. The results showed that after taking Shenqi for a certain period of time, the MAO-B activity in the brain was significantly reduced. The red blood cell SOD activity increased significantly. Older organisms have significantly increased heat production and cold tolerance without increasing body weight. The heart function is strengthened. It is suggested that Shenqi Mixture has better anti-aging effect.