Abstract: It is estimated that the recoverable resources of natural gas in China is about 11.54 trillion cubic meters,China is a large resource country in natural gas in world.But comparing with the world average level,it is relatively poor in gas resources in China.Gas resources in China is concentratively distributed in the central and the western region that is far away from eastern economi developed region,and moreover,the size of gas field is fas away from eastern economic developed region,and moreover,the size of gas field is small,the reserves abundance in gas field is lower.At present,the maturity in gas resourcesexploration is quite low,there has huge exploration potential in gas resources,the output of gas is expected to increase rather greatly,it is estimated that the domestic output of gas in 2005,2010 and 2015 will reach 50 billion cubic meters,83 billion cubic meters and 15 billion cubic meters respectively.In the short-medium-term,the proportion of gas made at home in the primary energy consumption is expected to increase with a rather great range,hopefully from 2.5% in 2000 to 9.4% in 2015.All this has important effect in optimization energy structure,increase the efficiency of energy utilization and realization energy sustainable development in China.