Abstract: It is difficult to simulate a velocity profile with the traditional least square method.This paper takes the Hough Transform to simulate a velocity profile by using the anti-noise advantage of Hough Transform to eliminate the noise points.If a higher accuracy resolution is required,the distances of points to the fitting line can be taken as the judgment standard,and the data eliminated noise points by Hough Transform can be simulated by the least square method.Results of inspection and application show that the velocity profile simulated by Hough Transform is more close to the measured values than that simulated by the least square method.