城市排水管道是城市的血脉,管网的维护和保养是一个很重要的问题,只有及时的维护,才能保证管网系统的正常运行。否则会导致其系统功能的丧失,甚至会产生局部管网系统的瘫痪,影响人民的正常生活以及生产的正常进行。文章分析了我国城市室外排水管维护技术存在的几个问题,提出了一些城市排水管网维护技术和改进措施。 Urban drainage is the city’s blood vessels, pipe network maintenance and repair is a very important issue, and only timely maintenance, in order to ensure the normal operation of the pipe network system. Otherwise it will lead to the loss of its system functions, and even lead to the partial paralysis of the pipe network system, affecting people’s normal life and the normal production. The paper analyzes several problems existing in the outdoor drainage pipe maintenance technology in our country and puts forward some city drainage pipe network maintenance technologies and improvement measures.