Airborne weapon launch system is the link and bridge between army aircraft and airborne weapon. Combined model based system engineering (MBSE) research idea and design flow with application of airborne weapon launch system. Carried out application analysis through requirement analysis, functional analysis and system design integration, MBSE applications in airborne weapon launch system was considered, some suggestions was put forward. The result of experiment shows that this study can support for MBSE applying in airborne weapon launch system and has some engineering meaning.