Abstract: Accurate classification of drainage and extraction reservoir types of coalbed methane wells can lay a foundation for the study of pressure propagation in drainage process. Taking 3# coal seam of Changcun Mine Field as the research object, the main parameters affecting the conductivity of coal reservoir and the recharge capacity of surrounding rock in the process of drainage and extraction are analyzed and selected. The method of obtaining these parameters is proposed, and the critical value is determined. The study area is divided into four types of drainage reservoirs. The water production and gas production of CBM wells in the field verify the reliability of the theory. The significance of classification of drainage and extraction reservoir types was discussed. The results show that the study area can be divided into high-conductivity weak supply reservoir, high-conductivity strong supply reservoir, low-conductivity weak supply reservoir and low-conductivity strong supply reservoir. Among them, the high conductivity and weak recharge reservoir is most conducive to reduce coal reservoir pressure, showing the characteristics of small water production and short casing pressure time. The low conductivity and strong recharge reservoir shows the characteristics of large water production and long casing pressure time.