Particle　damping　technology　has　attracted　extensive　research　and　engineering　application　interest　in　the　field　of　vibration　control　due　to　its　prominent　advantages,　including　wide　working　frequency　bands,　ease　of　installation,　longer　durability　and　insensitivity　to　extreme　temperatures.　To　introduce　particle　damping　technology　to　long-period　structure　seismic　control,　a　novel　multilayer　compartmental　particle　damper　(MCPD)　was　proposed,　and　a　1/20　scale　test　model　of　a　typical　long-period　self-anchored　suspension　bridge　with　a　single　tower　was　designed　and　fabricated.　The　model　was　subjected　to　a　series　of　shaking　table　tests　with　and　without　the　MCPD.　The　results　showed　that　the　seismic　responses　of　the　flexible　or　semi-flexible　bridge　towers　of　long-period　bridges　influence　the　seismic　responses　of　the　main　beam.　The　MCPD　can　be　conveniently　installed　on　the　main　beam　and　bridge　tower　and　can　effectively　reduce　the　longitudinal　peak　displacement　and　the　root　mean　square　acceleration　of　the　main　beam　and　tower.　In　addition,　no　particle　accumulation　was　observed　during　the　tests.　A　well-designed　MCPD　can　achieve　significant　damping　for　long-period　structures　under　seismic　excitations　of　different　intensities.　These　results　indicate　that　the　application　of　MCPDs　for　seismic　control　of　single-tower　self-anchored　suspension　bridges　and　other　long-period　structures　is　viable.