This paper summarizes the theory and practice research on the fourth generation port, and defines and analyzes the concept and features of the fourth generation port based on the location and the functional factors. It is considered that the fourth generation port has broken the location limit and become a network harbor group, which is a collection of port, port industry and port new city industrial and urban function, with an integral function of port, industry and city; The fourth generation port has expanded the traditional function, and can provide integrated manufacturing, logistics, information, trade and financial services. The study on the fourth generation port helps to fully recognize and understand the development trend of the future ports, which has an important practical significance for the construction of ports.