To　find　an　effective　strengthening　method　for　free-standing　museum　cultural　relics,　seismic　performances　of　a　cultural　relic　strengthened　by　nylon　lines　were　studied　by　shaking　table　tests.　Based　on　actual　sizes　of　a　museum　showcase,　a　1　:　1　scale　model　was　built.　A　ceramic　cultural　relic　was　put　in　the　showcase　by　free-standing　mode.　Nylon　lines　were　considered　to　strengthen　the　relic　and　shaking　table　tests　were　carried　out.　By　white　noise　excitation　frequency　distributions　of　the　showcase　were　obtained;　by　inputting　3　different　types　of　earthquake　waves　(El-centro　wave,　Taft　wave　and　Artificial　wave　of　II　type　site　classification)　with　different　intensities　(0.1　g,　0.2　g,　0.3　g　and　0.7　g　of　peak　ground　acceleration　values),　seismic　responses　of　both　showcase　and　relic　were　studied,　aseismic　results　of　nylon　lines　were　discussed.　Results　show　that　prominent　frequency　ingredients　of　the　showcase　are　far　greater　than　those　of　the　input　earthquake　waves,　thus　the　showcase　is　not　damaged　seriously;　for　the　relic　after　it　is　strengthened　by　nylon　lines,its　peak　displacement　and　acceleration　response　values　decrease,　which　are　still　obvious　under　strong　earthquakes.　Thus　by　nylon　lines　the　relic　can　be　effectively　strengthened.