Pressure swing adsorption（PSA）is an effective method of separation and purification of gas mixtures.With an appropriate absorbent，the pressure swing adsorption process could separate the coalbed methane（CBM）mixture effectively.The breakthrough curves of CBM（CH4/N2 mixture gas）on three activated carbons and four carbon molecular sieves adsorption column were measured.The influence of the regeneration condition was studied.The experimental results showed that all seven adsorbents can separate the mixture of methane and nitrogen to a certain extent，and the separation effect was better while the adsorbents were regenerated at high temperature and low pressure.And it is still necessary to develop more efficient adsorbents.