The　nonlinear　dynamic　behavior　of　a　laminated　composite　cantilever　plate　is　investigated　in　this　paper.　The　cantilever　plate　is　considered　to　be　subjected　to　the　in-plane　and　transversal　excitations.　The　Reddy＇s　high-order　shear　deformation　theory　as　well　as　von　Ka´rma´n　type　equations　are　used　to　establish　the　equation　of　motion　for　the　cantilever　plate.　Applying　the　Galerkin　procedure　to　the　partial　differential　governing　equations　of　motion　for　the　system,　equations　of　transverse　displacement　are　obtained.　Then　the　method　of　multiple　scales　is　used　to　obtain　the　averaged　equations.　The　extended　Melnikov　method　is　employed　to　predict　the　multi-pulse　chaotic　motions　of　the　cantilever　plate.　The　theoretical　result　shows　that　there　exists　Shilnikov　type　multi-pulse　jumping　movement.　The　numerical　results　also　reveal　such　chaotic　phenomenon.