The　multi-pulse　orbits　and　chaotic　dynamics　of　the　simply　supported　laminated　composite　piezoelectric　rectangular　plates　under　combined　parametric　excitation　and　transverse　loads　are　studied　in　detail.　It　is　assumed　that　different　layers　are　perfectly　bonded　to　each　other　with　piezoelectric　actuator　patches　embedded.　The　nonlinear　equations　of　motions　for　the　laminated　composite　piezoelectric　rectangular　plates　are　derived　from　von　Karman-type　equation　and　third-order　shear　deformation　laminate　theory　of　Reddy.　The　four-dimensional　averaged　equation　under　the　case　of　primary　parametric　resonance　and　1:2　internal　resonances　is　obtained　by　directly　using　the　method　of　multiple　scales　and　Galerkin　approach　to　the　partial　differential　governing　equation　of　motion　for　the　laminated　composite　piezoelectric　rectangular　plates.　The　system　is　transformed　to　the　averaged　equation.　From　the　averaged　equation,　the　theory　of　normal　form　is　used　to　find　the　explicit　formulas　of　normal　form.　Based　on　normal　form　obtained,　the　extended　Melnikov　method　is　utilized　to　analyze　the　multi-pulse　global　bifurcations　and　chaotic　dynamics　for　the　laminated　composite　piezoelectric　rectangular　plates.　The　analysis　of　global　dynamics　indicates　that　there　exist　the　multi-pulse　jumping　orbits　in　the　perturbed　phase　space　of　the　averaged　equation.　From　the　averaged　equations　obtained,　the　chaotic　motions　and　the　Shilnikov　type　multi-pulse　orbits　of　the　laminated　composite　piezoelectric　rectangular　plates　are　found　by　using　numerical　simulation.　The　results　obtained　above　mean　the　existence　of　the　chaos　for　the　Smale　horseshoe　sense　for　the　simply　supported　laminated　composite　piezoelectric　rectangular　plates.　Copyright　©　2009　by　ASME.