Abstract: We present enrichment and separation of coal mine methane in the coal mine roadway by vacuum pressure swing adsorption (VPSA). And the purpose is to ensure the safety of coal production, and to achieve resources reusing for low concentration methane. In the experiment, self-designed double tower VPSA equipment and modified activated carbon adsorbent were used. The whole process of VPSA includes atmospheric pressure adsorption and vacuum desorption. Under the precondition of double units, the adsorption quantity of two types adsorbent was compared and identified. To further optimize duty parameters, the flux of after-adsorption and desorbed gas, the concentration of methane in after-adsorption and desorbed gas was studied by adjusting the parameters such as switching time, the purge gas quantity, and the change law of the methane concentration before and after adsorption separation, and so on. The results show that VPSA can effectively realize the separation and enrichment of low concentration methane in coal mine.