The resumption project of the Beijing-Hangzhou Grand Canal to the north of the Yellow River，involves Shandong，Hebei，Tianjin and Beijing，with a length of 800 km and a construction period of 5~10 a. In the process of project research，there are complicated data，planning scheme changes and personnel changes of all parties involved in the construction，etc.，so it is difficult for traditional design and management software to achieve the integration of multi-source data and the effective use of data at various stages. The paper introduces a method and its application scenarios to solve the above problems based on 3D GIS technology. The planning and design software platform of inland waterway project integrates model data，image data，vector data，attribute data and design files to realize management integration of geographic big data in planning and design stage，realizes the rapid query and statistical analysis of information，data sharing，etc. This paper expounds the technologies in the process of platform construction and functions that designers pay attention to in the planning stage to provide reference methods and thoughts for the application of GIS technology in the water transportation industry.