This paper introduced the construction technology principle of hanging installation of underground gas drainage pipeline system, gave detailed construction process and measurement line, pipeline prefabrication, pipeline transportation, pipeline installation, accessories installa-tion, system pressure test, test try run operation and other key points, pointed out should be taken quality and safety control measures of in con-struction, finally analyzed the advantages of the construction method.%介绍了井下瓦斯抽放管路系统吊挂安装的施工工艺原理，详细给出了施工工艺流程和测量放线、管道预制加工、管道运输、管道吊装、附件安装、系统压力试验、系统试运行等操作要点，指出了施工中应采取的质量和安全控制措施，最后分析了该施工方法的优点。
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