The Yangtze Estuary deepwater channel is an important channel for large sea vessels entering and leaving the main harbor area of Shanghai Port and the main port of the lower reaches of the Yangtze River.With the rapid development of social and economic development in the hinterland and the development trend of large-scale ship,not only the number of ship ships increased in Yangtze Estuary deepwater channel,but also the trend of large-scale ship is beyond expectation.Based on the analysis of the existing navigational contradictions,ship characteristics and channel resources in the Yangtze River Estuary,we put forward the idea of using the slope of the channel to carry out the ultra-wide rendezvous,and analyze its adaptability and related safeguard measures.The use of slope natural water depth navigation improves the utilization ratio of the Yangtze Estuary 12.5 m deepwater channel,and implements the supply-side reform.It is great significance to carry out the implementation of the two major national strategies“the Yangtze Economic Zone” and “the Belt and the Road”,and to promote the construction of Shanghai international shipping center.