Abstract: In order to improve the mine gas extraction effect,the safety and reliability evaluation system of gas extraction system is set up.Using analytic hierarchy process(AHP) to calculate the index weight,the check of indicators consilience is passed.Using nalytic hierarchy process to establish evaluation model,the example evaluation of gas extraction system in Dashuitou coal mine is carried out.According to the evaluation results,whether the mine gas extraction system meet safety production requirements is judged,and the weak links of needing to improve is put forward,which ensures the safety production of mine.