Bulk　anisotropic　PrCo5　nanostructured　magnets　were　prepared　by　hot　deformation　technique.　The　effects　of　height　reduction　on　the　structure　and　magnetic　properties　of　the　magnets　were　studied.　It　is　found　that　the　height　reduction　plays　an　important　role　in　the　formation　of　c-axis　crystal　texture　of　PrCo5　phase　during　hot　deformation　process.　With　the　increase　of　height　reduction,　the　c-axis　crystal　texture　becomes　more　and　more　dominant,　indicating　strong　magnetic　anisotropy　in　the　magnets.　As　a　result,　the　saturated　magnetization　(M-s)　of　the　magnets　increases　gradually,　while　the　coercivity　(H-ci)　of　the　magnets　drops　simultaneously,　resulting　in　the　remanence　(M-r)　of　the　magnets　rising　first,　peaking　at　80%　height　reduction,　then　dropping　again.　Under　optimal　height　reduction　of　80%,　the　PrCo5　magnet　bears　magnetic　properties　of　M-s　of　1.00　T,　M-r　of　0.86　T,　H-ci　of　488.5　kA/m,　and　(BH)(max)　of　96.87　kJ/m(3).　(C)　2011　American　Institute　of　Physics.　[doi:　10.1063/1.3562508]