Based on the analysis of No.2 coalbed methane reservoir's 3D characteristics, gas content and their distribution features, physical properties of the reservoir, and regional tectonic background, the con- trolling factors of development features of coalbed methane reservoir were discussed. The results indicate that the regional tectonic evolution history, which dominates directly the burial history and hydrocarbon generation history, is the main governing factor of the coalbed methane reservoir. The groundwater hydro- dynamic characteristic and surrounding cocks sealing characteristic，the key factors determining the pres- ervation condition of coalbed methane reservoir. Summarily, The No.2 coalbed methane reservoir is mono- clinic- hydrodynanuc sealing reservoir type.