The　electromagnetic　vibration　noise　level　of　a　permanent　magnet　synchronous　motor　(PMSM)　directly　affects　the　Noise,　Vibration,　and　Harshness　(NVH)　performance　of　an　electric　vehicle.　Taking　a　PMSM　for　electric　vehicle　driving　as　an　example,　the　electromagnetic　noise　characteristics　were　studied　by　combining　ANSYS　Workbench　multi-physical　field　finite　element　analysis　platform.　The　electromagnetic　vibration　force　of　the　stator　teeth　of　the　motor　is　the　main　source　of　electromagnetic　noise.　The　magnetic　field　of　the　motor　can　be　optimized　by　changing　the　slot　structure　of　the　motor　rotor,　so　as　to　improve　the　electromagnetic　vibration　force　of　the　stator　teeth　and　reduce　the　electromagnetic　vibration　noise　of　the　motor.　In　order　to　optimize　the　magnetic　field,　three　different　rotor　slot　structures　are　proposed.　The　most　suitable　slot　structure　is　found　by　comparing　and　analyzing　the　magnetic　field,　noise　field,　and　electromagnetic　force　with　the　structure　before　optimization.　By　comparing　the　results　before　and　after　optimization,　it　can　be　seen　that　the　optimized　motor　can　effectively　reduce　the　vibration　noise　of　the　motor　and　ensure　the　electromagnetic　performance　of　the　motor.　©　2021,　Electromagnetics　Academy.　All　rights　reserved.