Under　the　long　term　cyclic　vibration　loading,　the　primary　structural　plane　in　rock　slopes　may　expand　and　produce　new　fracture　surfaces,　which　directly　affect　the　stability　of　rock　slopes.　According　to　the　similarity　theory,　a　physical　model　of　a　slope　was　built　to　simulate　a　jointed　rock　slope.　The　cyclic　shear　load　was　applied　on　the　shaking　table　with　the　amplitude　of　1.0,　1.25and　1.5mm　respectively　and　the　dynamic　response　of　the　jointed　rock　slope　under　cyclic　loads　was　recorded.　The　deformation　of　the　jointed　rock　slope　under　the　horizontal　and　vertical　cyclic　loads　with　the　amplitude　of　1.5mm　was　compared.　The　deformation　of　the　slope　increases　with　the　increasing　of　vibration　amplitudes　and　vibration　time.　The　slope　is　more　sensitive　to　the　vertical　cyclic　load,　while　the　deformation　at　the　top　of　the　slope　is　larger　than　that　at　the　bottom.　The　long　term　vibration　load　leads　to　the　extension,　expansion　and　coalescence　of　the　primary　crack,　which　increases　the　deformation　of　the　slope.　Two　possible　failure　modes　of　the　slope　under　cyclic　loads,　the　integral　landslide　and　the　partial　sliding,　were　presented　according　to　the　deformation　results　of　tests.　©　2016,　Science　Press.　All　right　reserved.