To address the current issues in automatically converting bridge information models to finite element models, including loss of key geometric information and difficulty in adding loads and boundary conditions, this study develops a conversion interface between Revit information models and ANSYS finite element models using C# on the Visual Studio 2022 platform, based on the Revit API secondary development technology. The interface retrieves geometric, spatial, physical, load, and boundary information from the model, converting it into ANSYS APDL command streams. ANSYS then generates finite element models, adds loads and boundary conditions, and performs finite element calculations. This paper details the development concepts, tools, and key technologies, and validates the interface through engineering case studies, demonstrating its accuracy, convenience, and efficiency.