In　order　to　investigate　different　types　of　fields　of　the　vibration　properties　and　isolated　effect　of　isolated　continuous　girder　bridges　under　different　earthquake　intensity　excitations,　a　1/10　isolated　bridge　model　consisting　of　two-span　continuous　deck　and　square　lead　rubber　bearing　(LRB)　using　in　test　were　designed　and　mechanical　characteristics　of　LRB　were　tested.　Based　on　it,　simulated　shaking　table　test　was　carried　out.　Results　show　that　the　amplitude　and　ingredient　of　frequency　spectra,　site　sort,　earthquake　intensity　and　fault　layer　have　important　influence　on　isolated　effect　of　isolated　bridges.　Under　different　peak　seismic　waves　and　peak　accelerations,　the　isolated　bridge　structure　is　stable　because　horizontal　stiffness　of　LRB　is　great　under　minor　earthquake　input.　Much　earthquake　energy　is　dissipated　and　energy　transmitted　to　the　upper　part　of　bridge　can　be　reduced　due　to　areas　of　displacement　hysteretic　curves　of　bearing　restoring　force　is　big　and　horizontal　stiffness　of　LRB　is　small　under　large　earthquake　input.