In　this　paper,　the　Rare-earth　Iron　Boron　(RE-Fe-B)　magnets　were　fabricated　successfully　by　using　the　double　main　phase　method　through　mixing　the　Neodymium　Iron　Boron　(Nd-Fe-B)　powders　and　Misch-metal　Iron　Boron　(MM-Fe-B)　powders　with　different　ratio.　Aiming　at　the　nanocrystalline　RE2Fe14B　magnets　prepared　by　using　spark　plasma　sintering　technology,　phase　structure　and　magnetic　properties　were　investigated.　It　is　found　that　the　Misch-metal　(MM)　alloys　promote　the　domain　nucleation　during　the　the　process　of　magnetization　reversal　and　then　damage　the　coercivity　(H-cj)　of　isotropic　RE2Fe14B　magnets,　while　the　H-cj　could　still　remain　more　than　1114.08　kA/m　when　the　mass　proportion　of　MM　(simplified　as:　＂a＂)　is　30%.　Curie　temperature　and　phase　structure　were　also　researched.　Two　kinds　of　mixed-solid-solution　(MSS)　main　phases　with　different　Lanthanum　(La)　and　Cerium　(Ce)　content　were　believed　to　be　responsible　for　the　two　curie　temperature　of　the　RE2Fe14B　magnets　with　＂a＂　＞=　20%.　This　is　resulted　from　the　inhomogeneous　elemental　distribution　of　RE2Fe14B　phase.　(C)　2017　Elsevier　B.V.　All　rights　reserved.