The　hot　deformation　behavior　of　aluminum　alloy　5E61　was　studied　by　hot　compressive　tests　using　a　Gleeble-1500　thermal　simulator.　The　tests　were　performed　at　temperatures　varying　from　250　to　500　and　strain　rates　ranging　from　0.001　s-1　to　10s-1.　The　results　achieved　in　the　present　study　showed　that　the　steady　flow　stress　increases　with　decreasing　temperature　and　increasing　strain　rate,　in　accordance　with　the　Zener-Hollomon　parameter.　The　related　microstructure　is　sensitive　to　deformation　temperature,　strain　rate　and　strain.　The　constitutive　equation　based　on　true　stress-true　strain　curves　has　been　developed　by　hyperbolic　sine　equation　with　the　hot　deformation　activation　energy　of　153.907KJ/mol.　The　softening　mechanism　could　be　ascribed　dominantly　to　dynamic　recovery.　The　results　of　TEM　observation　suggested　that　Mncontaining　particles　and　Al3(Er,Zr)　phase　have　precipitated　in　the　aluminum　matrix　and　pin　the　dislocations,　which　could　effectively　inhibit　the　dynamic　recrystallization.　©　2017　Trans　Tech　Publications,　Switzerland.