Ports, as the connecting point of land and water transport, play an important role in the transportation network. In recent years, the contradiction of resource utilization between the ports and the rear land has become more and more serious, so it is very urgent and necessary to implement the strategy of land and sea coordination. An evaluation index system and the corresponding model are established for the coordinated development of land-sea coordination system for ports from the perspective of quantitative research. The case study of Weifang Port is empirically analyzed. Some countermeasures and suggestions for the coordinated development of land-sea coordination system for Weifang Port are put forward.