Abstract: Based on the "Ventilation technical standards for metal and nonmetal underground mines ventilation system judge standards" and the years of field work experience, multi-level evaluation indexes system of metal and nonmetal underground mines ventilation system is established by studying its characteristics in order to solve the deficiency of the current domestic evaluation indexes. By combining ventilation safety management with scientific idea of human, machine and environment, the 28 evaluation indexes could reflect the status of metal and nonmetal underground mines ventilation system systematically and scientifically. With the establishment of evaluation indexes system, AHP can be used to calculate the weight of each evaluation indexes and the results could be applied to the fuzzy evaluation of metal and nonmetal underground mine ventilation system.