Abstract: Microvascular imaging can effectively improve the sensitivity and spatial resolution of blood flow imaging. To further meet the clinical requirements of quantitative measurements for microvascular, this article demonstrated technical features and performance verification results of microflow quantitative analysis function, which was developed based on Ultra Micro Angiography function. This article provided preliminary validation on the measurement of Synchronous Arbitrary Gate-PW (SAG-PW) using a Doppler flow phantom and a moving string phantom. The Doppler flow phantom results demonstrated that the SAG-PW measurement values were close to the traditional PW results, and the average error of multiple sets of measurement results under different conditions was 3.9%. The results of SAG-PW and PW were strongly linear correlated, with the slope and correlation coefficient approaching 1. The TAMEAN was measured using the moving string phantom and the relative errors of SAG-PW and different phantom set values were within 10%.