In　the　present　study,　bulk　anisotropic　nanocrystalline　SmCo5　magnets　were　prepared　by　hot　deformation.　The　effect　of　deformation　temperature　on　the　texture　and　magnetic　properties　are　presented,　based　on　which　the　mechanism　of　plastic　deformation　and　texture　formation　during　the　hot　deformation　process　is　discussed.　Our　analyses　reveal　that　deformation　temperature　is　one　of　the　most　important　parameters　that　determine　the　texture　of　SmCo5　grains.　We　suggest　that　diffusion　creep　plastic　deformation　occurs　during　hot　deformation,　which　is　very　sensitive　to　the　energy　gain　provided　by　an　increase　in　temperature.