In　this　study,　a　nonlinear　energy　sink　(NES)　is　used　to　suppress　the　nonlinear　aeroelastic　response　of　graphene　platelet　reinforced　composite　(GPLRC)　lattice　sandwich　plates　in　a　supersonic　airflow　for　the　first　time.　The　face　sheets　and　lattice　core　trusses　of　lattice　sandwich　plates　were　reinforced　with　graphene　platelets　(GPLs).　The　effective　elastic　modulus　of　the　GPLRC　was　solved　using　the　Halpin-Tsai　micromechanical　model,　and　Poisson＇s　ratio,　mass　density,　and　coefficient　of　thermal　expansion　were　calculated　using　the　rule　of　mixtures.　Kirchhoff　plate　and　first-order　shear　deformation　theories　were　used　separately　to　model　the　face　sheets　and　lattice　core　layer　of　the　structure.　The　nonlinear　strain-displacement　relationship　was　derived　using　the　von　Karman　large-deformation　theory.　The　aerodynamic　load　was　simulated　using　the　piston　theory.　The　motion　equations　of　the　supported　GPLRC　lattice　sandwich　plates　with　an　NES　under　supersonic　flow　were　derived　using　the　Lagrange　equation　and　the　assumed　mode　method.　The　nonlinear　aeroelastic　responses　of　the　GPLRC　lattice　sandwich　plate　system　coupled　with　an　NES　were　solved　using　Newmark　direct　integration　combined　with　the　Newton-Raphson　iteration　technique.　Finally,　a　detailed　study　of　the　effects　of　the　NES　on　the　suppression　of　the　flutter　behavior　of　GPLRC　lattice　sandwich　plates　was　carried　out.　The　results　showed　that　within　specific　mass,　damping,　and　nonlinear　stiffness　ranges,　the　NES　could　effectively　suppress　the　nonlinear　aeroelastic　response　of　the　GPLRC　lattice　sandwich　plates.