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 in the current comprehensive evaluation of mine ventilation system, such as unreasonable determination of the index system and difficulty in weight maintenance, from the three perspectives of the components, properties, and capabilities of the mine ventilation system, as well as eight dimensions including "ventilation power, ventilation network, ventilation facility", "safety reliability, economic rationality", "support capability, disaster prevention capability, and disaster resistance capability" 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 multi-perspectives and multi-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 is proposed, which is based on equidistant grading and proportional weighting.The expert ranking index weighting method can quickly determine and maintain the evaluation weight, so that the evaluation result are objective and easy to operate.