Thirty volunteers matching the criteria of ”Healthy” were recruited from the staff of China Medical College Hospital. Sheng-Mai-San was prescribed for the study group and Placebo to the control group. Effect of Sheng-Mai-San on human blood pressure, heart rate and left ventricular performance was evaluated before and after the administration of these agents. A Kenlu-model K-300 Sphygmomanometer, TOSHIBA SSA-270A echocardiography (M-mode) and electrocardiography were arranged for the detection and record of cardiovascular parameters. After taking Sheng-Mai-San, the study group showed reduction of the blood pressure and the peripheral resistance, in the meanwhile increase of the fractional shortening and the ejection fraction was noted. The result suggest that Sheng-Mai-San may be a potential cardiovascular activator to the the healthy, and it can promote the left ventricular performance by vasodilatation.