Based on summarizing the development achievements and problems of the 14th Five-Year Plan,the ideas and countermeasures for promoting high-quality development of the Yangtze Estuary waterway during the 15th Five-Year Plan period are prospected.The results show that the Yangtze Estuary waterway urgently needs to systematically enhance its overall throughput capacity and safety resilience level during the 15th Five-Year Plan period,which is a crucial stage for China to accelerate the construction of a strong transportation country and improve the modern inland waterway transportation system.In this regard,the high-quality development ideas and countermeasures for the waterway are proposed during the 15th Five-Year Plan period,mainly including:1)Focus on enhancing resilience and accelerate the construction of a modern waterway facility system.2)Highlight the improvement of quality and efficiency,and enhance the system of waterway maintenance and protection.3)Emphasize the empowerment of new quality productivity,and deepen the innovation and application system of waterway technology.4)Increase support and guarantee,and improve the system of waterway supporting facilities and equipment.5)Adhere to bottom-line thinking,and build a solid system of navigation safe and green development.At the same time,it is also recommended to take active actions in seizing the favorable opportunities for estuarine protection and regulation,increasing financial and ecological support,and strengthening collaborative management and integrated development among all parties within the jurisdictional water area.It can comprehensively enhance the navigation management system and modernization level of the Yangtze Estuary waterway,which will provide useful ideas and references for China to explore the construction practice of world-class estuarine navigation channel.