Iron　hook　is　widely　used　to　strengthen　Chinese　tenon-mortise　joint　to　enhance　its　strength　in　southern　China　districts.　To　find　strengthening　effects　of　this　material,　by　shaking　table　tests　dynamic　characters　as　well　as　seismic　responses　of　a　1:8　scale　wooden　frame　model　were　studied　under　conditions　that　each　of　its　tenon-mortise　joint　was/was　not　strengthened　by　iron　hook.By　white　noise　excitation,values　of　basic　frequency　of　both　unstrengthened　and　iron　hook　strengthened　models　were　obtained;by　inputing　El-centro　earthquake　waves　of　different　peak　acceleration　values,　displacement　and　acceleration　responses　of　the　models　were　obtained,dynamic　magnification　factors　for　tenon-mortise　joints　as　well　as　models　were　discussed.Results　show　that　after　each　tenon-mortise　joint　of　the　model　is　strengthened　by　iron　hook,its　basic　frequency　increases,its　displacement　and　acceleration　responses　under　earthquakes　decrease.However　as　iron　hook　can　only　restrict　tenon　from　pulling　out　of　mortise　but　not　rotation　of　the　joint,　the　dynamic　magnification　factors　for　strengthened　model　still　tend　to　increase　under　strong　earthquake.Thus　strengthening　effects　of　this　method　are　limited.