Abstract：In the north bank of the north branch channel of the Yangtze River Estuary,Yinyang port area of Qihai operating district has been planned.The port construction promotes the development of local marine ship industry,but it also faces problems such as the lack of anchorage layout planning and insufficient typhoon prevention capacity.This paper focuses the necessity of typhoon prevention anchorage layout in the northern branch from the aspects of the typhoon prevention requirements,anchorage layout and safety hazards of typhoon prevention measures,and analyzes the construction conditions of the anchorage in downstream of north branch channel from the aspects of tidal sediment,river regime,water depth,planning and engineering coordination.Then a site selection plan for typhoon prevention anchorage is proposed.The research results show that the area on south side of the red float from BZ3# to BZ2# is a suitable location for arranging typhoon protection anchorage,which has relatively advantageous water depth conditions,and it is close to the Yinyang port area,showing a slight siltation trend but in a state of siltation shrinkage.This research can provide reference for port planning adjustments in the future.