〔Abstract〕 Blood flow spectrum waveform curve contains abundant hemodynamic information. When the artery is severely stenosis or occlusion, the spectral morphology of the upstream and downstream arteries will have characteristic changes. The spectral morphology of the upstream and downstream arteries can be used to evaluate the arterial stenosis and occlusion. How to effectively extract the blood flow parameters related to diagnosis and make diagnosis more accurate has always been the concern of researchers at home and abroad. In this study, the main research Methods of current blood flow spectrum waveform analysis, such as time domain analysis, frequency domain analysis and modeling analysis, and the research progress of blood flow parameter extraction are introduced, and the future research direction of characteristic parameters of hemodynamics is prospected.