The cross-river inverted siphon is constructed by the cofferdam scheme，not only has a large investment and a slow progress，but also involves the construction problems of foundation pit drainage and flood season，which often becomes the restriction point for the implementation of the project.The inverted siphon across the Xinjiang river in the west branch of Shangrao city water supply and diversion project was successfully installed by sinking the 582m inverted siphon steel pipe in one time，which saved a lot of investment and time for the project，and provided valuable reference for the design and construction of similar river-crossing pipelines in inland areas.