The　compression　testing　at　elevated　temperatures　was　carried　out　for　1235　aluminum　alloy　prepared　by　different　purification　ways　with　the　help　of　dynamic　thermal　simulation　experimental　technology.　The　material　constants　of　hot　deformation　have　been　presented　by　multivariate　regression　directly,　and　effects　of　inclusion　content　in　1235　aluminum　alloy　on　the　constants　were　analyzed　empathically.　The　results　reveal　that　purification　has　the　great　effects　on　the　materials　constant　of　1235　aluminum　alloy　during　hot　deformation,　especially　on　the　hot　deformation　activation　energy,　where　the　better　the　purification　effects,　the　lower　the　hot　deformation　activation　energy　is.　Compared　with　that　of　1235　aluminum　alloy　prepared　by　other　purification　methods,　the　hot　deformation　activation　energy　of　the　alloy　prepared　by　high-efficiency　purification　treatment　which　possesses　the　lowest　inclusion　content　exhibits　the　lowest　of　149.　51　kJ/mol,　showing　desirable　hot　plastic　performance.　Inclusion　content　makes　as　a　function　of　the　hot　deformation　energy　activation　energy,　in　which　with　decreasing　in　inclusion　content,　the　hot　deformation　activation　energy　is　decreased.　Oxidation　inclusion　in　the　alloy,　such　as　Al　2O3,　during　hot　deformation,　can　pin　the　dislocation,　restricting　the　bundle　gathering　of　the　dislocation　and　widening　the　width　of　the　extending　dislocation.　Therefore　cross-slip　of　screw-dislocation　is　not　easy　to　generate　by　decreasing　the　fault　energy,　so　hot　deformation　activation　energy　is　increased.