Abstract: The scientific comprehensive evaluation of the mine ventilation system is an important basis for the optimization and adjustment of the mine ventilation system. So far,a recognized comprehensive evaluation index system and method have not been formed. Aiming at the problems of unreasonable determination of the index system and difficulty in weight maintenance in the current comprehensive evaluation of mine ventilation system,from the three perspectives of the components,properties,and capabilities of the mine ventilation system,8 dimensions including “ventilation power,ventilation network,ventilation facilities”, “safety reliability,economic rationality”,“ support capability,disaster prevention capability,disaster resistance capability” and selected 10 evaluation indicators, this study adopts theoretical analysis, literature synthesis and other methods to construct a comprehensive evaluation index system of mine ventilation system. The evaluation index system can comprehensively reflect the comprehensive situation of the evaluated object from multiple angles and multiple dimensions,grasp the main factors,and ensure the comprehensiveness and credibility of the comprehensive evaluation. At the same time, an expert ranking index weighting method,which is based on equidistant grading and equiproportional weighting,is proposed. The expert ranking index weighting method can quickly determine and maintain the evaluation,it makes the evaluation result objective and easy to operate.