BIM technology is already accepted and popularized in recent years in China, so the transformation of the same building model from one software to another is needed for the users. Based on the requirement, we developed the interface software for Revit and Etabs. Furthermore, we tested many practical projects and got satisfied results. The paper presented the structure of the software, and some transformation results of practical projects. Then we compared the analysis results of one project with its transformation in different software. All the results proved that the P-Trans could be used in projects.