Abstract:A comparative study has been conductecd on the anti-tree-radical damage by the vital energy-re(?)g and blood-tonifying methods. The result shows that Sijunzi decoction and Siwu decoction can increase the vitality of SOD, accelarate the elimination of free-radical and inhibit the growth of LPO and MAO-B. This means that both these two methods help to delay senility and the vital energy-reinforcing one is more effective.