AC　contactor　is　a　kind　of　low-voltage　electrical　apparatus　which　applied　widely.　The　bounce　of　the　contact　in　the　closing　process　is　one　of　the　important　factors　which　will　affect　the　system　performance　and　its　electrical　endurance.　The　closing　process　of　AC　contactor　is　a　nonlinear　and　complex　dynamic　process.　If　the　input　energy　is　more　than　the　expending　energy　which　caused　by　coil　and　the　others,　and　then　the　excess　energy　will　be　consumed　by　bounce　of　contacts　and　cores.　Therefore,　more　and　more　research　has　been　done　on　the　contact　bounce　in　the　closing　process.　With　the　continuous　development　of　intelligent　control　technology,　the　bounce　of　cores　and　contacts　can　be　reduced　or　even　eliminated　by　controlling　the　AC　contactor＇s　dynamic　process　through　modern　control　technology　based　on　a　reasonable　structural　design.　On　the　basis　of　energy　distribution　of　AC　contactor　in　the　closing　process,　a　control　program　is　designed　for　controlling　the　energy　in　each　stage　for　suppressing　the　bounce　of　contacts　and　cores.　As　a　result,　the　energy-efficient　operation　of　AC　contactor　is　realized.　The　controller　is　verified　through　the　experiment.