A　brand-new　simulation　method　for　the　intelligent　AC　contactor　was　proposed.　The　simulation　method　integrated　the　SPICE　simulation　of　the　control　module　with　the　dynamic　simulation　of　the　contactor　and　realized　the　closed-loop　point-by-point　co-simulation　between　the　intelligent　control　module　and　the　AC　contactor.　The　underlying　hardware　circuit　of　the　intelligent　AC　contactor　can　be　designed　in　Multisim.　And　the　dynamic　model　of　AC　contactor　can　be　designed　in　LabVIEW.　In　addition,　a　two-way　data　channel　has　been　built　between　Multisim　and　LabVIEW.　Both　of　the　softwares　perform　the　nonlinear　time-domain　simulation　simultaneously　and　independently,　and　exchange　data　at　the　end　of　each　simulation　time　step　so　as　to　realize　the　co-simulation.　The　co-simulation　system　can　find　a　reasonable　control　scheme　for　the　intelligent　AC　contactor.　At　the　same　time,　the　digital　control　technology　has　been　introduced　and　a　current　closed-loop　control　module　for　AC　contactor　was　designed.　The　co-simulation　and　the　digital　control　have　been　verified　effectively.　©2015　Chin.　Soc.　for　Elec.　Eng.