针对大庆石油化工总厂埋地给水管道未防腐的内壁腐蚀严重，进行了腐蚀原因分析，提出防腐的必要性。同时对管道内壁采用砂浆衬里的合理性进行了分析，通过该衬里与涂料防腐层的可行性对比。说明采用砂浆衬里对给水管道内防腐是优先选用的方法，其综合效益是相对最好的。 In view of the serious corrosion of the non-corrosive inner wall of the buried water supply pipe in Daqing Petrochemical General Plant, the reason of corrosion was analyzed and the necessity of anti-corrosion was proposed. At the same time, the rationality of using the mortar lining on the inner wall of the pipeline was analyzed, and the feasibility of the lining and the paint coating was compared. It shows that the use of mortar lining is the preferred method for anti-corrosion in the water supply pipeline, and its overall efficiency is relatively best.