Abstract:This paper is aimed to introduce statistical measurement method that used to promote air amount monitoring accuracy of main mine ventilator. We adopted statistical method of turbulence to measure single-point air velocity and converted it to mean velocity of the same section based on unsteady of velocity field structure. By this way, we can decrease monitoring error in fan drift that caused by non-uniform distribution and turbulent fluctuation of air flow. To verify the reliability of the method, we carried out experiments in fan drift of long shou mine. The results indicate that, velocity field coefficients measured by statistical methods have good stability, which decrease the monitoring errors to 4%. Furthermore, the method can be used to performance test and on-line air flow monitoring of mine main ventilator.