The　geometrically　nonlinear　random　vibration　response　of　stiffened　laminated　plates　under　acoustic　excitation　is　carried　out　by　using　the　equivalent　linearization　(EL)　technique　combined　with　the　reduced-order　model　and　the　finite　element　method.　The　nonlinear　equations　of　motion　of　stiffened　laminated　plates　are　obtained　based　on　large　deflection　finite　element　formulation.　The　proper　orthogonal　decomposition　technique　is　used　to　select　the　modal　basis,　and　a　reduced-order　model　of　the　structures　is　established.　Based　on　the　force　error　minimization　approach,　the　EL　formulation　for　solving　nonlinear　random　vibration　response　is　derived.　Then　the　EL　technique　is　incorporated　into　finite　element　software　NASTRAN　by　the　direct　matrix　abstraction　program,　and　the　direct　matrix　abstraction　program　also　realizes　the　iterative　process　of　determining　the　modal　equivalent　linear　stiffness　matrix.　Then,　the　statistical　dynamic　response　results　obtained　by　EL　and　linear　method　are　compared　and　analyzed.　It　is　verified　that　the　proposed　method　has　high　accuracy　and　efficiency,　and　it　can　be　applied　to　the　geometric　nonlinear　random　vibration　response　analysis　of　stiffened　laminated　plates.　The　results　show　that　geometric　nonlinearity　plays　an　important　role　in　the　vibration　response　of　stiffened　laminated　plates,　especially　under　high　sound　pressure　loads.