Abstract: This paper described the study progress of the concentrating technologies for low-concentration oxygen-containing coal-bed methane, including the pressure swing adsorption, directly cryogenic liquidation, solution absorption, membrane separation, hydrate method and so on. The pressure swing adsorption technology has already more mature application cases at home and abroad, the directly cryogenic liquefaction technology has successfully realized the industrial application in the home, but the technologies of the membrane separation, low-temperature fluefectaion absorption and hydrate method are still at the research stage, and there is not any significant breakthrough and industrial application. In the paper, comparative analysis was carried out on the advantages and disadvantages of these concentrating technologies, it was deemed that these concentrating technologies can be coupled according to their advantages and disadvantages so as to form a more economical technological combination for the purifcation and application of the low-concentration oxygen-containing coal-bed methane.