2:17-type　Sm(CoFeCuZr)z　permanent　magnets　had　satisfied　the　high　temperature　applications　on　aerospace　and　national　defense　due　to　their　excellent　magnetic　properties,　high　Curie　temperature,　good　thermal　stability,　strong　corrosion　resistance　and　oxidation　resistance.　It　has　become　the　best　candidate　in　high　temperature　permanent　magnets.　Recently,　with　the　requirement　of　application　at　higher　temperature　and　development　of　high　temperature　permanent　magnets　in　electrical　vehicles,　2:17-type　SmCo　permanent　magnets　draw　new　attentions.　In　general,　the　key　work　to　obtain　high　magnetic　properties　is　to　achieve　high　remanence,　large　coercivity　and　low　temperature　coefficient.　Correspondingly,　the　effect　methods　to　enhance　the　magnetic　properties　of　the　magnets　include　increasing　Fe　content,　tuning　the　content　and　distribution　of　Cu,　and　doping　heavy　rare-earth　elements,　etc.　Previous　studies　focused　on　the　evolution　of　nano-scale　microstructures　in　inner　grains　of　Sm(CoFeCuZr)z　magnets,　with　few　reports　on　the　location　of　grain　boundaries.　In　this　paper,　the　recent　progresses　in　preparing　Sm(CoFeCuZr)z　magnets　with　high　magnetic　properties　were　reviewed,　and　reported　the　correlation　among　composition,　structure,　and　magnetic　properties　induced　by　changing　of　element　content　and　modification　method,　influence　of　Cu　distribution　at　grain　boundary　of　magnets　on　magnetic　properties　and　related　mechanism,　and　modification　of　the　microstructure　at　grain　boundaries　in　Sm(CoFeCuZr)z　magnets　performed　with　doping　technology　were　reported.　The　problem　and　enhanced　the　magnetic　properties　with　new　method　were　also　analyzed.　©　Editorial　Office　of　Chinese　Journal　of　Rare　Metals.　All　right　reserved.