This paper takes Hangzhou Xiaoshan international airport phase III project as the research object. Aiming at the problems of low accuracy and low efficiency of model application of Autodesk Revit software in dealing with complex transition curve shape structure, the modeling of transition curve shape structure is studied based on Dynamo visualization programming plug-in, and the application practice is carried out in the modeling of the underground lane structure of the project. The application of transition curve shape structure modeling and batch extraction of positioning coordinates is realized, which greatly improves the efficiency and accuracy of modeling, and provides reference for the application of BIM technology in similar projects.