Abstract: Through the analysis of the main influence factors in mine ventilation system,the evaluation index system of coal mine ventilation system is identified,and the evaluation model of coal mine ventilation system is constructed by adopting principle and method that combining the analytic hierarchy process(AHP) and the grey comprehensive evaluation.Using AHP,the eigenvector of pairwise comparison matrix is taked as the evaluation factor weight of mine ventilation system,the gray correlation matrix is built through gray correlation relationship between the data sequences,each index influence sequence is accurately calculated in a quantitative way,and finally the main factors of mine ventilation system are pointed out.