Abstract: The conventional way to exploit coalbed methane is pressure lowering through drainage, which means that reducing pressure through water drainage for coalbed methane desorption. While, for water-sensitive reservoir, the recovery by conventional way is low; in order to exploit water-sensitive reservoir, combustion of coal seam is proposed to increase recovery ratio, and then theoretical feasibility is elaborated through four aspects: improving activity of molecules by temperature, diffusion by pressure, migration path by superficial area, promoting adsorption and desorption by competition; then given an example of water-sensitive reservoir, the obtained results show that the recovery is effectively improved through combustion of coal seam.