This　paper　established　a　virtual　prototyping　design　platform　for　AC　contactor.　A　dual　E-type　AC　contactor　was　used　as　the　research　object.　The　dynamic　characteristics　and　thermal　characteristics　of　the　contactor　were　simulated　based　on　the　virtual　design　platform.　The　accuracy　and　feasibility　of　the　platform　simulation　model　were　verified　by　experiments.　On　the　basis　of　this　platform,　the　influences　of　different　sub-magnet　ring　structure　parameters　and　core　structure　parameters　on　electromagnetic　attraction　and　temperature　rise　of　the　AC　contactor　are　analyzed.　This　paper　provides　an　efficient　and　feasible　method　for　the　development　and　design　of　AC　contactor,　and　provides　a　reference　for　the　structural　design　of　the　AC　contactor.　©　2019　IEEE.