In　this　study,　we　reported　on　the　bulk　anisotropic　nanocrystalline　Sm1-xPrxCo5　(x　=　0.2-0.6)　magnets　aimed　at　achieving　excellent　energy　products.　Through　a　combination　of　advanced　processing　techniques,　including　melt　spinning,　hot　pressing,　and　hot　deformation　process,　bulk　magnets　with　a　fine　nanocrystalline　structure　were　successfully　synthesized.　The　results　revealed　that　the　substitution　of　Pr　strengthened　the　c-axis　texture　and　the　saturation　magnetization,　facilitating　the　enhancement　of　remanence　(Mr)　and　maximum　magnetic　energy　product　[(BH)max].　However,　Pr　substitution　decreased　the　coercivity　(Hci)　due　to　the　reduced　magnetocrystalline　anisotropy　field.　Excellent　magnetic　properties　are　obtained　for　Sm0.4Pr0.6Co5　magnets　with　the　(BH)max　of　23.2　MGOe　and　Hci　of　11.8　kOe.　The　prepared　(Sm,Pr)Co5　magnets　with　different　Pr　contents　have　essentially　the　same　microstructure　with　RECo5　main　phase　grains　of　about　400　nm　in　diameter　and　fine　dispersed　rare　earthrich　nanoprecipitates.　Our　findings　can　provide　reliable　reference　for　manufacturing　nanocrystalline　permanent　magnet　materials　and　promote　the　development　of　rare　earth　permanent　magnet　new　materials.