To study the effect of peanut skin extracts on vascular rings and heart. The perfusion model of thoracic aorta rings of rats and isolated frog heart were applied to observe the response of artery contraction of peanut skin extract and its active ingredient. High performance liquid chromatography( HPLC) was used to analyze and determine the active ingredient. The result showed that peanut skin extract can significantly relax the contraction of rat aortic ring induced by HCL and NE,and significantly reduce th...