Using the method of experiment,132 experimental male mice which are randomly divided into 12 groups:normal group,Radix Ginseng group,Pericarpium Citri Reticulatae group and the combined groups(nine groups totally),To investigate the effect of the combined groups on the swimming time,serum lactic acid,index of testis and find the most sutible dose of the drugs.Which shows that compared with normal group,Radix Ginseng group,Pericarpium Citri Reticulatae group and some of the combined groups can decrease the serum lactic acid after mice’s swimming,prolong the time of mice’s swimming time;and all have the tendency in promote the index of testis but the combined group(0.5∶1.0).The best ratio of the combination is 1.0 to 0.5(2∶1)i,t is better than used Radix Ginseng only.