The　nonlinear　dynamic　behavior　ofalaminated　composite　cantilever　plateis　investigatedin　this　paper.The　extended　Melnikov　method　is　employed　to　predict　the　multi-pulse　chaotic　motionsof　the　cantilever　plate.　The　model　is　based　on　the　wing　flutter　of　the　airplane.The　cantilever　plate　is　considered　to　be　subjected　to　the　in-plane　and　transversal　excitations.TheReddy＇s　high-order　shear　deformation　theory　as　well　as　von　Ka´rma´n　type　equations　are　used　to　establishthe　equation　of　motion　for　the　cantilever　plate.　Applyingthe　Galerkin　procedureto　the　partial　differential　governingequations　of　motion　for　the　system,　we　obtain　equationsof　transverse　displacement.　Then　the　method　of　multiple　scalesis　usedto　obtain　the　averagedequations.　Finally,the　extended　Melnikov　methodis　usedto　analyzethenonlinear　behavior　in　the　cantileverplatesystem.Thetheoretical　result　showsthat　thereexistsmulti-pulse　jumping　movement.Thenumerical　results　also　reveal　such　chaotic　phenomenon.　Copyright　©　2011　by　ASME.