AC　contactor　is　a　frequently　operated　switching　device,　and　its　match　of　the　magnetic　force　and　reaction　force　during　movement　directly　affects　the　reliability　and　performance.　A　good　force　match　can　reduce　contact　bounce　and　improve　breaking　performance.　In　the　process,　the　spring　system　plays　a　key　role.　For　the　multi-objective　optimization　of　the　spring　system,　an　electromagnetic-mechanical　coupling　simulation　framework　and　an　entity　simulation　method　for　springs　are　presented.　A　comprehensive　optimization　method　based　on　grey　relational　method　and　response　surface　method　is　introduced.　The　second-order　prediction　model　is　established　that　describes　the　influence　of　contact　spring　free　height,　contact　spring　effective　coil　number,　reaction　spring　free　height　and　reaction　spring　effective　coil　number　on　bounce　time,　contact　breaking　velocity,　contact　closing　velocity　and　iron　core　closing　velocity.　Accordingly,　the　reaction　system　parameters　are　optimized.　The　experimental　results　show　that　the　optimal　reaction　system　parameters　can　effectively　reduce　the　bounce　time　and　the　closing　time　of　the　contact　and　the　iron　core,　and　increase　the　contact　breaking　velocity,　which　is　helpful　to　improve　the　working　performance　of　AC　contactors.　©　2022,　Electrical　Technology　Press　Co.　Ltd.　All　right　reserved.