In　this　paper,　the　dynamic　snap-through　phenomenon　of　a　six-layer　asymmetric　crossply　bistable　composite　laminated　plate　(0/0/0/90/90/90)　is　studied　and　the　nonlinear　vibrations　before,　after　and　during　the　dynamic　snap-through　are　demonstrated.　The　boundary　conditions　are　fixed　at　the　center　and　free　at　the　four　sides.　From　the　von　Kármán’s　large　deflection　theory,　the　dynamic　and　governing　equations　of　the　six-layer　asymmetric　cross-ply　bistable　composite　laminated　plate　are　established　by　using　the　Reddy’s　third-order　shear　deformation　theory　and　the　Hamilton’s　principle.　Taking　the　base　excitation　amplitude　as　the　control　parameter,　the　diagram　for　the　maximum　Lyapunov　exponents,　the　Poincaré　maps　and　the　time-history　for　the　dynamic　snap-through　are　obtained.　Based　on　the　maximum　Lyapunov　exponents　and　the　Poincaré　maps,　the　periodic　vibration,　the　quasi-periodic　vibration,　the　chaotic　vibration　and　the　dynamic　snap-through　of　the　six-layer　asymmetric　cross-ply　bistable　composite　laminated　plate　are　analyzed.　It　is　found　that　the　chaotic　vibration　is　a　favorable　condition　for　the　dynamic　snap-through.　©　2022,　Chinese　Academy　of　Mechanics.　All　rights　reserved.