Objective To investigate the protective effect of different proportions of compatible application of Taoren and Honghua of Xuefu Zhuyu Decoction on acute myocardial ischemia in rats.Methods Pituitrin was injected into dorsal veins of tongue to reproduce the model of acute myocardial ischemia. The contents of NO、ET、SOD and MDA in serum were observed.Results Xuefu Zhuyu Decoction of different compatible proportions of Taoren and Honghua could significantly enhance the contents of NO and SOD,while reduce the levels of ET and MDA(P