The　experiments　were　carried　out　to　study　the　shock　isolation　effect　of　the　intelligent　shock　isolated　system　composed　of　the　spring　and　the　MR　damper.　The　applicability　of　the　control　algorithms　were　studied　under　the　shock　vibration.　The　conclusions　are　that　in　the　same　semi-active　control,　the　control　effect　attained　from　the　three　kinds　of　different　computed　methods　(COC,　IOC,　LQR)　is　almost　similar.　They　can　be　selected　arbitrarily　for　use,　and　among　them　IOC　algorithm　is　relatively　simple.　According　to　peak　value　of　the　acceleration,　the　better　control　algorithms　are:　LSL_IOC,　Switch,　and　Bangbangl.　The　vibration　isolation　ratio　of　these　control　algorithms　is　up　to　91%.　It　proveds　that　the　system　of　shaking　composed　of　the　spring　and　intelligent　damping　is　feasible.