This　paper　presents　a　bidirectional　piezoelectric　actuator,　which　can　be　used　to　vibration　control　of　serially　connected　isolation　System.　Firstly,　the　performance　test　of　this　control　device　was　processed.　Then　vibration　control　experiment　of　serially　connected　isolation　system　with　this　control　device　based　on　sweep　sine　shaking　table　was　carried　out.　The　experimental　results　show　that　this　control　device　has　stable　mechanical　properties,　produces　semi-active　control　force　fast　and　has　the　outstanding　control　efficiency　for　serially　connected　isolation　system.　In　addition,　this　control　still　has　the　satisfactory　control　efficiency　when　the　piezoelectric　actuator　of　this　control　is　failed,　which　indicates　the　fail-safe　function　of　this　control.