Structural dynamics modeling is a key technological task in the development of launch vehicles, load design, mechanical environment prediction, control system design, and POGO vibration suppression. Combined with the development process of launch vehicles, the application of structural dynamics analysis technology in the field of launch vehicles is reviewed from four aspects: beam model, beam-shell hybrid model, 3D model based on direct modeling and 3D model based on model assembly. Combining the development of numerical computation technology and the iterative development path of launch vehicles, this analysis examines the trends in the engineering application of launch vehicles from several aspects, including efficient liquid-solid coupling computational technology, multidisciplinary dynamics analysis technology, dynamics analysis twin technology, and launch vehicle dynamics analysis technology based on artificial intelligence. These insights provide guidance and reference for the future design of rockets.