The gas content of the coalbed is one of important parameters for assessing coalbed methane resources. There is rich coal in the Carbonaceous -Permian of western Henan. Based on the coal geology i gas content measurements, gas emission and other data, this paper analyzes the reliability of gas content measurement and the influences of the ranks of coal metamorphism, coal burial depth, structure, thickness of overlying continuous deposits, thickness of coal and lithologic characters of the hanging wall and foot wall of the coalbed on the gas content of the coalbed. Then the curves fitting the relationships of the gas content with the rank of coal metamorphism and depth as well as their functional relationships are established and the characteristics of the spatial distribution of the gas content of a coalbed are summarized. Finally, the authors conclude that the gas content of the coalbed is high and the prospects of exploiting coalbed methane are very bright.