With an underground horizontal well in the underground roadway connected to the original surface extraction “U” type well, CBM surface extraction can be converted to the underground positive pressure extraction, which can eliminate many disadvantages of surface extraction of coalbed methane, help to reduce extraction cost, and improve extraction management. At present, for coal mine gas treatment, negative pressure drainage with atmospheric pressure boreholes is adopted, where in the process of drilling, the original formation pressure in the coal seam is reduced rapidly, leading to gas channel damage due to compaction effect. In order to solve this problem, the comprehensive coalbed methane extraction technology and application were investigated in Baode Coal Mine, where underground drainage at positive pressure was used. This method can effectively improve the final gas recovery; thus, providing a new way to reduce the extraction cost of Baode Coal Mine. The method is worthy of extensive popularization.