The　long-span　spatial　structure　is　flexible,　and　the　damping　ratio　of　the　structure　is　relatively　strong　under　horizontal　and　vertical　earthquakes,　and　the　uplift　force　exists　at　the　support.　To　satisfy　the　application　of　seismic　isolation　of　such　buildings,　the　paper　proposes　an　anti-uplift　three-dimensional　bearing.　The　bearing　is　composed　of　a　high　damping　rubber　bearing　and　an　upper　disc　spring　device　in　series.　The　horizontal　and　vertical　mechanical　properties　of　the　test　were　studied.　In　the　horizontal　direction,　the　test　focuses　on　the　hysteretic　behavior　of　the　bearing　under　simple　harmonic　excitation,　and　investigates　the　influence　of　shear　strain　and　loading　frequency　on　its　horizontal　mechanical　properties.　In　the　vertical　direction,　the　equivalent　stiffness　and　equivalent　damping　ratio　of　the　bearing　were　tested　as　well.　Experimental　research　was　carried　out　to　investigate　the　effects　of　different　loading　amplitudes　and　different　loading　frequencies　on　their　vertical　hysteresis　performance.　The　results　show　that　the　composite　isolation　bearing　has　good　hysteresis　performance　in　both　horizontal　and　vertical　directions.　The　horizontal　equivalent　damping　ratio　is　between　12.48%　and　14.77%,　which　decreases　with　the　increase　of　shear　strain,　it　increases　with　the　loading　frequency:　the　vertical　equivalent　damping　ratio　is　from　6.67%　to　17.76%,　vertical　loading　frequency　makes　minor　effect　on　it.