The construction of the national spatial planning system clearly requires that the technical standards of port planning and other related special planning should be connected to it and superimposed on the “one map” of national spatial planning. The traditional port planning dimension remains at the level of two-dimensional layout，and the means of multi-dimensional multi-source spatial information analysis is missing. The technical system of whole life cycle planning and management has not been established，and the level of spatial analysis and quantitative optimization is backward，which is difficult to adapt to the new requirements of the territorial spatial planning system. As a data model that integrates various information of engineering，BIM is a brand-new method involving planning，design，construction，and operation management. It is also an effective technical means that can solve the problems of overall planning and connection of land and space resources related planning. This article summarizes the application of BIM technology in the field of engineering at home and abroad，and points out the specific problems faced by the application of BIM technology in the field of port planning，such as the lack of application architecture，the lag in the development of spatial planning technology，and the need to improve the application standard system. The application direction of technology in port planning including promoting the integrated development of BIM+GIS，expanding the perspective of port planning scheme optimization，and effectively linking the detailed control results in related fields，etc.，is put forward to promote the application of BIM technology in the whole process of port engineering scheme optimization and scientific decision-making.