Stability　and　bifurcation　analysis　of　a　composite　laminated　cantilever　rectangular　plate　subject　to　the　supersonic　gas　flows　and　the　in-plane　excitations　is　presented　in　this　paper.　The　non-linear　governing　equations　of　motion　for　the　composite　laminated　cantilever　rectangular　plate　are　derived　based　on　von　Kármán-type　plate　equation,　Reddy＇s　third-order　shear　deformation　plate　theory　and　Hamilton＇s　principle.　Galerkin＇s　method　is　utilised　to　convert　the　governing　partial　differential　equations　to　a　two-degree-of-freedom　non-linear　system　under　combined　parametric　and　external　excitations.　The　present　study　focuses　on　resonance　case　with　1:2　internal　resonance　and　primary　parametric　resonance.　The　method　of　multiple　scales　is　employed　to　obtain　four　non-linear　averaged　equations　which　are　then　solved　by　using　the　normal　form　theory　to　find　the　non-linear　dynamic　responses　of　the　plate.　It　is　found　that　double　Hopf　bifurcation　of　the　plate　occurs　under　certain　conditions.　©　2015　W.　S.　Maney　&　Son　Ltd.