The　Shilnikov　type　multi-pulse　chaotic　dynamics　of　a　parametrically　excited　simply　supported　rectangular　thin　plate　is　studied　in　this　paper.　The　formulas　of　the　rectangular　thin　plate　are　derived　by　using　the　von　Karman　type　equation　and　the　Galerkin＇s　approach.　The　global　perturbation　analysis　is　directly　applied　to　the　non-autonomous　governing　equations　of　motion　for　the　rectangular　thin　plate　by　using　the　extended　Melnikov　method,　which　was　used　to　deal　with　autonomous　perturbed　Hamiltonian　system.　The　case　of　buckling　is　considered　for　the　rectangular　thin　plate.　The　extended　Melnikov　method　is　improved　to　analyze　the　non-autonomous　nonlinear　dynamical　system.　Numerical　simulation　is　employed　to　find　the　Shilnikov　type　multi-pulse　chaotic　motions　of　the　rectangular　buckled　thin　plate.　The　results　obtained　here　indicate　that　the　multi-pulse　chaotic　motions　can　occur　in　the　parametrically　excited　simply　supported　rectangular　buckled　thin　plate.