Abstract: The vibration simulation test of four different TiAl alloy coating models by ABAQUS software under different pressure was carried out. It is found that, the greater the pressure on the same model, the better the damping property of TiAl alloy. Further analysis using LAMMPS molecular dynamics software and Atomeye visualization software, the effects of microstructure change on the damping performance of the model under different pressures were found. The influence of different defects on the damping performance of the model was obtained.