Most dynamic simulation analyses use rigid components.In real life,it can meet the requirements to treat components as rigid systems,but this ignores the influence of component deformation.In order to get more real and effective data,part of the model components must be treated as flexible bodies.In order to study the dynamic performance of a capture buffer mechanism,the research method of dynamics and the overall idea of rigid-flexible coupling research were introduced from theoretical level,and the comprehensive experimental analysis and comparison of the capture buffer mechanism from the perspective of rigid-flexible coupling multi-body dynamics were carried out by using MNF file and LOD file derived from ANSYS and ADAMS.By this coupled study,the combination of dynamics and structural simulation is realized,the more accurate simulation data are gotten,the structural data are obtained on the basis of the dynamic measurement data,making the simulation results more comprehensive.It also provide some reference for multi-body dynamics simulation problems with higher requirements.