Aiming at the problem of electromagnetic vibration and noise of the motor, based on the basic theories of electromagnetic vibration noise, the finite element simulation method of electromagneticstructural weak coupling was used to analyze the radial electromagnetic force density of a permanent magnet synchronous traction motor with 12 poles and 72 slots under the conditions of different aspect ratios, slot widths and comprehensive changes of both factors. At the same time, electromagneticstructure coupled field analysis was performed on the whole motor to study the structural vibration displacement with the stator aspect ratio, slot width and comprehensive changes of both factors. By comprehensively comparing and analyzing the two simulation results, the variation law of the electromagnetic vibration noise about the aspect ratio and the slot width of the stator structure was given. Finally, the physical prototype was subjected to vibration detection and spectrum analysis under rated load conditions, and the results were compared with simulation values to verify the accuracy of simulation experiments.