Abstract: Based on local hydrological and sediment data and river bed processes analysis, it is reasonable to select the North passage of South branch as the future deep water channel.Fixed and movable bed m'odel tests show that it is possible to have a-12. 5m deep water channel by means of training works (mainly) and dredying (supplementarily). The project is one the important component parts and the first-step project of the comprehensive training plan for the development of the Yangtze estuary. In general, the project is of much benefit in all aspects.