This　paper　investigates　the　multi-pulse　global　bifurcations　and　chaotic　dynamics　of　the　high-dimension　nonlinear　system　for　a　laminated　composite　piezoelectric　rectangular　plate　by　using　an　extended　Melnikov　method　in　the　resonant　case.　Using　the　von　Karman　type　equations,　Reddy＇s　third-order　shear　deformation　plate　theory　and　Hamilton＇s　principle,　the　equations　of　motion　are　derived　for　the　laminated　composite　piezoelectric　rectangular　plate　with　combined　parametric　excitations　and　transverse　excitation.　Applying　the　method　of　multiple　scales　and　Galerkin＇s　approach　to　the　partial　differential　governing　equation,　the　four-dimensional　averaged　equation　is　obtained　for　the　case　of　1:2　internal　resonance　and　primary　parametric　resonance.　From　the　averaged　equations　obtained,　the　theory　of　normal　form　is　used　to　derive　the　explicit　expressions　of　normal　form　with　a　double　zero　and　a　pair　of　pure　imaginary　eigenvalues.　Based　on　the　explicit　expressions　of　normal　form,　the　extended　Melnikov　method　is　used　for　the　first　time　to　investigate　the　Shilnikov　type　multi-pulse　homoclinic　bifurcations　and　chaotic　dynamics　of　the　laminated　composite　piezoelectric　rectangular　plate.　The　necessary　conditions　of　the　existence　for　the　Shilnikov　type　multi-pulse　chaotic　dynamics　of　the　laminated　composite　piezoelectric　rectangular　plate　are　analytically　obtained.　Numerical　simulations　also　illustrate　that　the　Shilnikov　type　multi-pulse　chaotic　motions　can　also　occur　in　the　laminated　composite　piezoelectric　rectangular　plate.　Overall,　both　theoretical　and　numerical　studies　demonstrate　that　the　chaos　in　the　Smale　horseshoe　sense　exists　for　the　laminated　composite　piezoelectric　rectangular　plate.