The South-to-North Water Diversion project, with large span, large flow, complex environment and wide uses, is a national strategic project, which is related to the national economy and people's livelihood. Donghong dn1000mm large diameter steel mesh skeleton composite pipeline, with its superior water hammer resistance, low fluid resistance and other characteristics, has successfully become the first steel-plastic composite pipeline project in the South-to-North water transfer project, pipeline excavation and pipeline welding construction at the same time, greatly shortening the project cycle, perfect solution to the problem of large flow, large span and high pressure safe water transmission. To help the east route of the South-to-North Water Diversion project. It shows the national engineering service ability of Donghong steel wire mesh composite pipeline with large diameter and long span.