The　application　of　bulk　nanocrystalline　Nd-Fe-B　permanent　magnets　manufactured　by　hot　deformation　methods　was　severely　limited　by　production　efficiency.　Therefore,　this　work　proposed　an　efficient　preparation　method　combining　hot　rolling　and　deformation.　Using　the　melt-spun　Nd-Fe-B　magnetic　powders　as　original　materials,　dense,　large-sized,　and　well-uniform　precursors　for　deformation　can　be　obtained　through　cold　pressing　and　hot　rolling.　The　large-sized　hot-rolled　magnet　can　be　cut　into　small　pieces　and　subjected　to　hot　deformation.　The　deformed　magnet　exhibits　obvious　crystallographic　anisotropy,　and　the　optimal　maximum　energy　product　can　reach　35.7　MGOe.　Furthermore,　the　mechanism　of　deformation　and　texture　formation　has　been　systematically　studied,　according　to　the　microstructure　and　texture　characterization　of　different　height　reduction　magnets.　The　results　indicated　that　there　was　a　typical　heterogeneous　structure　in　the　hot-rolled　and　hot-deformed　Nd-Fe-B　magnets.　Dissolution　precipitation,　grain　growth,　and　regular　grain　arrangement　were　the　main　reasons　for　deformation　and　texture　formation　during　the　deformation　process.　Our　strategy　of　replacing　traditional　hot-pressing　with　large-sized　hot-rolling　can　produce　massively　deformed　precursors　at　once,　greatly　improving　production　efficiency,　which　is　crucial　for　promoting　the　application　of　bulk　nanocrystalline　anisotropic　Nd-Fe-B　permanent　magnets.　©　2024