SmCo(5)sintered　magnets　with　good　thermal　stability　are　mainly　used　in　high-temperature　field.　In　this　study,　two　types　of　SmCo(z)powders　with　different　nominalzvalues　were　mixed　and　synthesized　into　SmCo(5)magnets　by　the　traditional　powder　metallurgy　method.　The　magnetic　properties　of　the　SmCo(5)sintered　magnet　are　maximum　energy　product　of　(BH)(max)　=　172.29　kJ　center　dot　m(-3),　remanence　ofB(r)　=　7.47　x　10(5)A　center　dot　m(-1)and　coercivity　ofH(ci)　=　2.42　T.　The　results　show　that　there　are　three　coexisting　phases　in　the　magnet,　which　are　SmCo(5)phase,　Sm(2)Co(7)phase　and　Sm(2)O(3)phase.　The　microstructural　observation　indicates　that　the　average　grain　size　in　the　magnet　is　about　8　mu　m,　and　the　high　coercivity　of　this　magnet　is　attributed　to　these　fine　grains.　X-ray　diffraction　(XRD)　and　electron　backscatter　diffraction　(EBSD)　results　indicate　that　the　magnet　has　a　well-aligned　(00l)　orientation　texture.