Abstract: The mechanical analysis of the structural model is still an isolated part in the information integration chain of BIM ( Building Information Modeling) technology． The composition and characteristic of the structural BIM model was analyzed through studying the data definition layers of BIM． The advantages were compared when the structural BIM model was adopted in the structural analysis and construction drawing design stage，and the included data information of the structural analysis model in the IFC4 version was discussed． An indirect method for the data conversion was proposed between BIM model and structural analysis model based on the methodology research，and a data conversion interface was developed． Four project cases were adopted to test the interface for data conversion between BIM model and structural analysis models，which created by four common finite element softwares． The results show that the data conversion interface has a good effect on different structural types，and can provide technical reference for data integration and sharing in the structural analysis phase by using BIM technology．