The　nonlinear　vibrations　of　a　laminated　composite　cantilever　plate　under　subsonic　air　flow　are　investigated　in　this　chapter.　According　to　the　ideal　incompressible　fluid　condition　and　the　Kutta-Joukowski　lift　theorem,　the　subsonic　aerodynamic　lift　on　the　lifting　surface　is　calculated　by　using　the　Vortex　Lattice　(VL)　method.　Then,　the　finite　length　plate　is　modeled　as　a　laminated　composite　cantilever　plate　based　on　the　Reddy＇s　third-order　shear　deformation　plate　theory.　Moreover,　the　von　Karman　geometry　nonlinearity　is　introduced.　The　nonlinear　partial　differential　governing　equations　of　motion　for　the　laminated　composite　cantilever　plate　subjected　to　the　subsonic　aerodynamic　force　are　established　via　Hamilton＇s　principle.　The　Galerkin　method　is　used　to　separate　the　partial　differential　equations　into　two　nonlinear　ordinary　differential　equations,　and　the　four-dimensional　nonlinear　averaged　equations　are　obtained　by　multiple　scales　method.　Through　comparing　the　natural　frequencies　of　the　linear　system　with　different　material　and　geometry　parameters,　the　1:2　internal　resonance　is　considered　here.　Corresponding　to　several　selected　parameters,　the　frequency-response　curves　are　obtained.　The　hardeningspring-　type　behaviors　and　jump　phenomena　are　exhibited.　©　2020　Nonlinear　Dynamics　of　Structures,　Systems　and　Devices　-　Proceedings　of　the　1st　International　Nonlinear　Dynamics　Conference,　NODYCON　2019.　All　rights　reserved.