The　LED　display,　i.e.,　the　center-hung　scoreboard,　nowadays　has　become　an　indispensable　display　device　in　large　stadiums,　and　some　of　which　with　weight　is　more　than　30t.　To　investigate　the　influence　of　center-hung　scoreboard　load　on　the　dynamic　characteristics　of　the　suspend-dome　structure,　a　1:20　dynamically　scaled　model　of　the　Lanzhou　Olympic　Sports　Complex　was　designed,　considering　different　lifting-lowering　heights　of　the　center-hung　scoreboard　by　changing　the　sling　length.　Shaking　table　dynamic　characteristics　experiment　was　conducted　by　using　the　white　noise　excitation　method　for　the　suspend-dome　structure　with　the　sling　lengths　of　200　mm,　400　mm,　and　600　mm　individually.　The　change　rule　of　dynamic　characteristic　pa-rameters　such　as　natural　frequencies　and　damping　ratios　was　concluded　by　the　Hilbert-Huang　Transformation　method　for　modal　identification　and　the　transfer　function　method　for　checking.　With　the　increase　of　sling　length,　the　natural　frequencies　of　the　center-hung　scoreboard　become　smaller,　and　the　damping　ratios　become　more　extensive.　Compared　with　the　results　of　the　scaled　model　without　a　center-hung　scoreboard,　the　high-order　natural　frequencies　and　damping　ratios　of　the　overall　structure　with　the　center-hung　scoreboard　are　significantly　increased,　and　the　coupling　effect　between　the　center-hung　scoreboard　and　the　structure　should　not　be　ignored　in　the　dynamic　analysis.　The　test　values　were　compared　with　the　simulation　results　of　Abaqus　as　well.　It　is　shown　that　the　test　values　of　the　scaled　model　are　essentially　consistent　with　the　simulation　results,　which　indicates　that　the　test　points　are　reasonably　arranged,　the　test　method　is　correct,　and　the　finite　element　modeling　method　is　accurate.　The　effects　of　sling　stiffness　and　sling　length　on　the　dynamic　characteristics　of　the　suspend-dome　structure　were　studied　by　Abaqus　software.　The　results　show　that　the　sling　stiffness　hardly　affect　the　dynamic　characteristics　of　the　overall　model.　When　the　sling　length　is　less　than　300　mm,　the　lifting-lowering　of　the　center-hung　scoreboard　influences　the　distribution　of　the　natural　frequency　and　the　vibration　mode　of　the　overall　structure.　In　this　range,　the　lifting-lowering　of　the　center-hung　scoreboard　should　be　focused　on　actual　engineering.