We proposed the Theory of Dynamics for High-speed Train Large-scale Coupling System, developed the dynamics performance analysis and design platform for the "train一line, pantograph-catenary, fluid-solid" coupling integration of high一speed trains, and realized the operation simulation and parameters optimization of the Large一scale System, solving such technical problems as the dynamics performance of high一speed EMUs and high一speed train bogies design, and providing technical support for the research and development of CRH380 series of high一speed EMU, high一speed test trains at the speed of 500 km per hour, new type high power locomotives and overloading trucks.