Abstract: Coal-bed gas content is an important indicator of coal reservoir comprehensive evaluation, it also has guiding significance for coalbed methane resources calculation and exploitation of coal-bed methane. Paper based on Ordos Basin L block as the research object, adopting Adsorption Isotherm method, respectively establish the relationship between coal industry components with and ,and then predict the coal seam gas content; In addition, combine logging curve data, integrate the influences of density, neutron, and gamma on coal-bed gas content, using multiple regression analysis, get the formula on the calculation of coal-bed gas content for the region, summarize the applicable condition of different forecasting methods, On the basis of gas content forecast, then classification evaluate the coalbed methane content by related parameters.