Using the Velocity Vector Imaging(VVI) technology to explore the impact of Danhong injection on patients’ ischemic myocardium after Percutaneous Coronary Intervention(PCI). Methods: To select 98 unstable angina patients in Beijing Hospital of Traditional Chinese Medicine during May 2012 to December 2012, and then randomly divide them into two groups, with 58 patients in Danhong injection group(with conventional medical treatment and Danhong injection) and 40 patients in the control group(with conventional medical treatment). Use VII technique to analyze the following data in two groups before and after PCI treatment: longitudinal and radial velocity image myocardial systolic wave maximum positive value (Vs), Systolic strain image maximum positive and negative wave value (S), Systolic strain ratio image maximum positive and negative wave value (SR) in Ischemic myocardial segments and non-Ischemic myocardial segments. Results: The systolic longitudinal section Ve, ε and εR in ischemic group are lower than those of non-ischemic group. Deformability of myocardial fibers in ischemic group decreased more than that of non-ischemic group. Conclusion: Danhong injection can relive ischemia of myocardial muscles during operations and can improve heart function. Besides, the application of VVI has a greater advantage than conventional echocardiography technology.