To　improve　the　precision　and　efficiency　of　the　traditional　injection　Molding　machine,　a　control　method　of　fully　electric　injection　molder　is　introduced.　With　a　summary　of　real-time　data　exchange　based　on　SERCOS　II,　the　concept　of　motion　control　and　the　hardware　system　are　mainly　included.　During　the　period　of　a　3-month　successive　test　operation,　the　molding　period　can　be　dominated　in　15　seconds　when　the　system　cycle-time　is　4　ms　and　the　injection　max-volume　is　80　cm3,　and　the　product　conforms　well　to　quality　and　precision.