The changing investment environment has brought new challenges to the port of Public-Private Partnership (PPP). The growing demand for navigation and limited port infrastructure have promoted port congestion and brought new opportunities to the public-private partnership of some ports. However, the anxiety of power distribution, the conflict of economic interests, the uncomfortable communication environment and the loss of intangible assets may restrict the realization of the goal of public-private partnership of ports. Therefore, this paper analyzes the essence and operation mode of PPP port based on Pareto efficiency and establishes a dynamic game model with the theme of public and private sectors. Finally, taking the port of Ningbo as an example, this paper discusses the possibility of realizing PARETO efficiency. It will be beneficial to the optimization of the public-private partnership project, provide theoretical support to the government and private enterprises for the project cooperation, strengthen the communication and communication among the project members, and improve the efficiency of the project construction and operation.