Following completion of the Yangtze estuary deep-water channel, the importance of maintenance and management becomes highlights. Informatization construction can further improve the working efficiency, providing a solid information base for the channel depth. This paper introduces the characteristics and necessity of digital information construction in the Yangtze estuary. According to the demand of the construction, this paper puts forward some preliminary idea of the target and framework of digital information construction of the Yangtze estuary. The results show that the Yangtze estuary digital information construction should contain the maintenance and management of waterway, waterway administrative management, asset management, channel intelligent monitoring, underwater terrain, dynamic monitoring of foreign information service. The general goal of Yangtze estuary digital information construction is building three big platform frameworks and two systems.