根据埋地天然气管道受到的交流干扰情况，针对性的对长输埋地管道交流干扰及防御问题进行了探讨，参照国内外同行业的交流干扰防护做法，总结了一种新的排流处理方法，实施效果理想。重点阐述了交流干扰的来源，交流干扰的形式、危害，高压输电线路对埋地金属管道的影响及处理措施，并分析了各种排流方法在实际运用中的特点，为近似问题的解决处理提供参考。

According to AC interference of the underground gas pipeline, AC interference and defense of long-distance pipeline were discussed. Refer AC interference protection measures of the same industry at home and abroad, a new exhaust stream processing method was summarized, and the effect was good. This paper focused on the sources, harm and form of interference, influence on buried metal pipeline of high voltage transmission line and treatment measures, and the characteristics of various drainage method in practical application was analyzed, thus provide a reference for solving the approximation problem.