Aiming at the problem of vibration and noise of permanent magnet synchronous motor, starting from the structural modality of the motor stator system, the influence of stator parameters on motor vibration and noise was analyzed through the simulation of the influence of different iron core models and different shell thicknesses on the stator system. The reliability of the simulation was verified by experiments. Finally, the general law of the influence of various parameters on the vibration mode of stator system was obtained.