Abstract: In order to confirm installation location of air velocity sensor adaptive to average air velocity in section of mine roadway and to ensure the accuracy of air Vo lume monitored and measured in the mine roadway, Fluent software was applied to the three dimensional numerical simulation on the air flow fields of 24 mine roadway mo dels under different mine roadway type,different section size and different air velocity condition. The point location where average air velocity was equal to the central axial line in the section of the mine roadway was established and the relationship between the point location and the mine roadway section was summarized. The distance to roo f from the point location of the mine rectangle roadway would be 11% ~ 12% of the mine roadway height and the distance to the roof from the point location of half arch roa dway was 15% ~ 16% of the mine roadway height. Meanwhile,a search table and calculation formula of the average air velocity was provided and in comparison with site m easured results,the air velocity data could be ftted basically and could provide powerful protection to the air velocity sensor applied to accurately monitor and measure the air flow volume of the mine roadway.