This　paper　proposes　the　theoretical,　numerical　and　experimental　researches　on　the　dynamic　snap-through　phenomena　and　nonlinear　oscillations　of　the　bistable　asymmetric　composite　laminated　square　thin　plate　under　the　foundation　excitation　and　novel　boundary　support.　The　boundary　conditions　of　four　corner　simply-support　(FCSS)　are　designed.　The　displacement　solutions　satisfying　the　boundary　conditions　are　assumed　to　describe　various　nonlinear　oscillations　of　the　bistable　asymmetric　composite　laminated　square　thin　plate　under　the　foundation　excitation.　According　to　the　third-order　shear　deformation　theory　(TSDT),　von-Karman　nonlinear　strain　displacement　relations　and　virtual　work　principle,　the　nonlinear　differential　governing　equation　of　motion　are　theoretically　derived　for　the　bistable　asymmetric　composite　laminated　square　thin　plate.　Based　on　Hamilton　principle,　the　nonlinear　ordinary　differential　equations　of　motion　for　the　curvatures　in　different　directions　are　obtained.　Numerical　simulations　are　used　to　analyze　the　interesting　snap-through　phenomena　and　nonlinear　oscillations　of　the　bistable　asymmetric　FCSS　composite　laminated　thin　plate.　The　influences　of　the　amplitude　and　frequency　for　the　basic　excitation　on　the　snap-through　are　discussed.　It　is　seen　that　under　a　certain　external　excitation,　the　bistable　plate　goes　through　the　single　stable,　periodic　snap-through　and　chaotic　snap-through　oscillations.　The　experimental　platform　of　the　bistable　asymmetric　composite　laminated　thin　plate　is　established　with　four　corner　simply-support　under　the　foundation　excitation.　Through　the　vibration　experiments,　the　dynamic　snap-through　phenomenon　and　nonlinear　oscillations　are　studied　for　the　bistable　asymmetric　FCSS　laminated　composite　square　thin　plates.　©　2022　Elsevier　Ltd