We　develop　a　new　finite　deformation　constitutive　model　for　metallic　glass　within　the　framework　of　irreversible　nonequilibrium　thermodynamics.　To　consider　the　intrinsically　out-of-equilibrium　characteristics　of　metallic　glass,　its　total　internal　energy　is　divided　into　two　weakly　coupled　configurational　and　kinetic　subsystems,　and　configurational　temperature　coupling　with　configurational　degrees　of　freedom　is　introduced　as　a　thermodynamic　state　variable　to　characterize　the　evolution　of　the　disordered　structure.　Furthermore,　the　classical　shear　transformation　zone　theory　is　extended　by　reasonably　considering　the　reverse　shear　transformation　as　a　form　of　the　relaxation　of　the　strain　field,　which　is　stored　in　the　elastic　matrix　and　produced　by　the　constraint　of　the　matrix　on　shear　transformation.　With　the　help　of　the　finite　element　implementation　for　the　new　model,　the　effectiveness　of　the　proposed　model　is　validated　by　comparing　the　modeling　stress-　strain　responses　of　the　macroscopic　deformations　under　different　temperatures　and　strain　rates　with　the　experimental　results,　and　the　utility　of　the　model　for　predicting　the　shear　banding　behavior　of　metallic　glasses　is　examined　as　well.　The　results　therefore　show　that　the　constructed　constitutive　model　can　not　only　effectively　predict　the　deformations　of　metallic　glass　under　different　ambient　temperatures　and　applied　strain　rates,　but　also　reasonably　explain　the　mechanisms　of　deformation　mode　evolution　and　shear　band　formation.