This　article　investigates　the　nonlinear　dynamic　response　of　the　magneto-electro-thermo-elastic　(METE)　laminated　microbeams　in　post-buckling　state　considering　the　modified　couple　stress　theory.　Based　on　the　nonlinear　post-buckling　dynamic　model　of　the　microbeam,　considering　the　main　parameter　resonance,　the　model　is　solved　and　analyzed　to　obtain　the　nonlinear　vibration　amplitude　frequency　response　relationship　by　applying　the　multi-scale　method.　Then,　the　Jacobi　matrix　is　used　for　steady-state　analysis　of　the　microbeam.　In　numerical　examples,　the　effects　of　material　length　scale　parameter,　magneto-electro-thermo　field,　axial　static　and　dynamic　loads,　and　span-thickness　ratio　on　the　dynamic　instability　region　and　amplitude　frequency　response　curve　of　METE　laminated　microbeams　are　discussed.