Data transfer, format conversion, long-term archiving, and data reuse of 3D models based on MBD technology is one of the main challenges of MBD technology, and STEP is the preferred file format and technical path to meet the challenges. At present, various commercial 3D application software does not fully support all the properties of STEP format. At this stage, the STEP AP242 format is able to convert and preserve the 3D model geometry and annotation set information fully and accurately, while the non-geometric information will be partially lost. There are two methods to compensate for the lost non-geometric information, based on the PDM system and based on the 3D model itself. The 3D model non-geometric information extraction tool was developed based on CATIA V5 customization development platform and verified to prove that the technical solution is feasible to be applied to the practical work of long-term archiving and usage of the 3D model of civil aircraft.