Abstract: River flow diversion at construction sites is an important aspect of construction management for water conservancy projects. Taking river flow diversion for Taipu gate rehabilitation as an example, this paper puts forward some river flow diversion measures for construction sites, such as reasonable dispatching, dredging river system, optimizing sluice and polder dispatching, and enabling Taipu pumping station to provide downstream water supply. It provides references for river flow diversion of river channel projects in Jiangnan River Basin.