Solenoid　Valve　is　a　kind　of　typical　low　voltage　electrical　appliance　with　special　working　characteristic.　Take　FDF　(FDF　is　a　series　of　model　of　solenoid　valve　Sanhua　company　produces)　series　solenoid　valve　for　example　which　applied　widely　in　refrigerating　system.　Its　temperature　rise,　vibration　noise　and　so　on　are　key　points　affecting　the　product　quality.　At　present,　the　research　on　solenoid　valve　mostly　specific　to　the　field　in　system　response　time　and　structure　design　and　it　lacks　the　analysis　on　the　overall　performance　indexes　and　optimal　design.　Therefore,　the　development　of　miniaturization,　less　consumption　of　the　energy　and　the　artificial　intelligence　of　solenoid　valve　will　be　restrained.　The　simulation　analyzing　system　for　dynamic　characteristic　and　temperature　calculation　in　working　state,　dynamic　characteristic　analysis　and　integrated　optimized　design　is　built　and　it　forms　unique　database　of　electrical　appliance　characteristic　analysis　and　simulation　design.　It　focuses　on　optimization　design　module　in　this　paper.　The　changing　regularity　of　the　temperature　rise　of　the　electromagnetic　mechanism　is　researched　and　concluded　based　on　the　3D　simulation　in　electromagnetic　and　temperature　field.　And　the　regular　is　brought　into　the　optimization　design　of　electromagnetic　mechanism.　Ant　colony　optimization　is　used　in　the　optimal　design　for　the　overall　performance　index,　and　the　dynamic　process　of　the　closing　state　and　closed　in　long　term　working　state　are　also　considered　at　the　same　time.　The　design　result　is　quite　satisfied.