Abstract: Objective: In order to solve the problems of tedious process and low efficiency in CWR (continuous welded rails) modeling on continuous box girder bridges of urban rail transit (referred to as ′CWR on bridge′) in ANSYS software, Revit software should be introduced to quickly realize with the interaction between architectural design software and finite element analysis software. Method: BIM (Building Information Model) is introduced as the bridge of information sharing and interactive application between the two stages of architectural design and structural analysis, and the Revit model is used as the information carrier of model transformation. Combined with the API (application program interface) of Revit software and the secondary development technology based on C# language, this paper a method of transforming the Revit model to the ANSYS model for CWR on bridge is put forward. After post\|processing and analysis of the converted model, the calculation results of rail longitudinal force and longitudinal displacement on continuous box girder bridge under temperature and train conditions are obtained, and compared with those of related literature to verify the rationality and accuracy of the method. Result &Conclusion: This method can automatically execute the pre\|processing process of ANSYS model (including geometry construction, material and element property assignment, model segmentation, meshing, and model constraint) by calling the parameter information of each structural component in the Revit model, and achieve direct conversion from Revit model to ANSYS model. This method is reasonable and accurate, it can break through the information barrier between Revit software and ANSYS software, and achieve the goal of importing complex Revit models into finite element numerical calculation, greatly reducing the time for modeling and calculation.