Zero-current　breaking　technology　is　an　important　content　in　the　research　of　intelligent　AC　contactor.　In　this　paper,　the　optimization　calculation　aimed　to　breaking　quickly　of　the　electromagnetic　mechanism　of　the　intelligent　AC　contactor　is　conducted,　by　using　the　ANSYS　electromagnetic　software　and　the　artificial　fish　swarm　optimization　algorithm　based　on　genetic　algorithm.　This　method　not　only　ensures　the　reliable　contact　process　of　the　intelligent　AC　contactor,　but　also　realizes　a　quick　release　of　the　executive　mechanism,　thus　greatly　reduces　the　influence　to　the　stability　and　accuracy　of　the　three-phase　contactors,　especially　the　first　opening　phase　when　zero-current　breaking,　which　improves　the　reliability　of　zero-current　breaking　and　increases　the　technology　research　level　of　the　intelligent　AC　contactor.　A　prototype　is　made　based　on　the　results　of　the　optimization　designation.　The　testing　results　show　that　the　breaking　time　of　the　intelligent　AC　contactor　is　shortened　greatly,　and　the　stability　of　the　breaking　time　is　improved　significantly　too,　so　the　reliability　of　the　zero-current　breaking　increases　significantly.