The 2nd International Conference of Mechanical System Dynamics (ICMSD2023) is devoted to "e;Technology Innovations by Understanding Mechanical Dynamics"e;, with 18 sessions to promote research in dynamic theories on complex structures, multidisciplinary integration, and advanced technologies for applications. It is held on September 1-5 in Peking University, Beijing, China. The conference is expected to provide a platform for academic researchers and engineers in the field of mechanical system dynamics to exchange scientific and technical ideas.