The　nonlinear　dynamics　of　functionally　graded　graphene　nanoplatelets　(GPLs)　reinforced　composite　plates　are　studied　based　on　the　first-order　shear　deformation　theory　(FSDT).　The　ordinary　differential　equation　of　the　plate　is　derived　by　Hamilton　principle　and　Galerkin　method.　The　multi-scale　method　is　used　to　analyze　the　jump　forces.　The　effects　of　GPL　distribution　pattern,　weight　fraction,　total　number　of　layers　and　plate　size　on　the　resonance　peak　under　sweep　excitations,　the　maximal　amplitude　and　attenuation　time　under　impact　loads,　the　jump　force　under　harmonic　excitations　are　quantitatively　studied.　The　highest　nonlinearity　is　found　for　the　plate　with　uniform　GPL　distribution.　The　change　of　the　number　of　layers　has　no　effect　on　the　nonlinearity　but　affects　the　natural　frequency.　The　size　of　the　plate　and　weight　fraction　of　GPL　both　influence　the　natural　frequency　and　nonlinearity,　thereby　influencing　the　dynamic　characteristics.