“西气东输”是我国距离最长、口径最大的输气管线 ,将成为贯穿我国腹地的大动脉。管线位处北纬的寒冷环境 ,温度低、压力大 ,形成的天然气水合物对管线的堵塞及其分解引起的危害是不容忽视的问题。本文从天然气水合物的结构出发 ,对它产生条件和分解方法进行了研究 ,给出了管线中天然气水合物的抑制方法 ,并提出了实施过程中可能出现的环境问题。 “West-East Gas Pipeline” is China’s longest gas pipeline with the largest caliber and will become a major artery running through the hinterland of our country. Pipeline is located in the cold latitude north latitude, low temperature, pressure, the formation of natural gas hydrate on the pipeline blockage and its damage caused by the decomposition can not be ignored problem. Based on the structure of natural gas hydrate, this paper studies the conditions and decomposition methods of natural gas hydrate, and presents the method to restrain natural gas hydrate in pipeline, and puts forward some possible environmental problems during the implementation.