Due to the particularity of the plateau environment,underground ventilation systems on plateau have the characteristics of low air pressure and insufficient oxygen,low inflow air temperature and humidity,low effective power of the motor,and the parameters of underground ventilation systems and fans on plateau are different from those of the plain area.Based on the analysis of the problems for underground ventilation systems on plateau,the parameters of underground ventilation systems and fans on plateau are studied.Based on the adjustment of underground ventilation parameters on plateau in engineering practice,the fan selection is designed,calculated and applied industrially.The on-site industrial test shows that the actual operation status of the fan is consistent with the design and calculation,verifying the effectiveness of parameter adjustment and fan selection.