This　paper　design　a　kind　of　DC　electrical　apparatus　with　no　arc　and　high-performance　communication.　Making　the　electromagnetic　contactor　as　the　design　object,　the　advanced　particle　swarm　optimization　is　applied　to　the　design　of　new　no-arc　intelligent　DC　contactor,　calculating　its　structrual　parameters　and　control　parameters　comprehensive　and　optimized,　finding　out　the　best　course　of　dynamic　parameters　and　control　structure　of　the　prototype　parameters,　and　forming　a　kind　of　intelligent　DC　contactor　with　high　reliability,　high　operating　frequency　and　high　electical　endurance　and　mechanical　endurance.　The　collision　of　the　electromagnetic　body　in　closing　process　and　the　bonce　of　contact　system　have　been　reduced　greatly,　and　make　the　performance　indexs　and　reliability　of　the　product　of　intelligent　no-arc　DC　contactor　have　been　greatly　improved.　The　prototype　has　been　tested　in　electromagnetic　compatibility,　making　and　bresking　capacity,　electrical　endurance　and　mechanical　life　and　so　on　in　Fujian　Provincial　Central　Inspection　Institute　and　Hunan　Provincial　Electrical　Apparatus　Detecting　Institute.　The　exeperiments　show　that　every　performance　of　the　prototype　is　good,　and　its　operation　is　reliable.　Copyright　©　2009　by　International　Academic　Publishers　Ltd.