Abstract: The ultrasonic technique is one of the most important technique to diagnosis the arterial stenosis which accuracy depends on not only the performance of the hardware,but also the signal processing and diagnosis information extraction algorithms employed to obtain the diagnosis information.In order to evaluation of the performance of signal analysis and processing algorithms,simulation experiments is usually performed based on the data obtained from computer simulation models.In recently years,several simulation models have been proposed to acquire the velocity distribution,and then some of them further simulate the ultrasound signals from the steady or pulsatile blood flow in the normal or stenosed vessels with different morphological features.This paper presents a general review of the main models according to the aspects of their principles,benefits,limitations and potential research fields in future.