Two　magnets　prepared　by　dual-main-phase　(Nd13Fe81B6　and　Dy21Fe73B6)　and　single-main-phase　(Nd13Fe81B6　with　DyHx　doping)　approaches.　The　content　of　the　Dy　element　in　the　composite　magnet　with　dual-main-phase　structure　(6.75　wt%)　is　lower　than　that　of　the　magnet　with　single-main-phase　structure　(7　wt%).　But　the　dual-main-phase　magnet＇s　coercivity,　remanence,　and　the　magnetic　energy　product　are　5.08　kOe,　0.36　kG,　and　2.99　MGOe,　higher　than　those　of　the　single-main-phase　magnet.　In　the　dual-main-phase　magnet,　the　diffusion　of　Nd　and　Dy　elements　is　more　prominent.　Part　Dy　element　replaces　the　Nd　element　to　form　(Nd,　Dy)2Fe14B　phase,　and　the　remaining　Dy　element　exists　in　the　form　of　Dy2Fe14B　phase,　which　improves　the　comprehensive　magnetic　performance　of　the　magnet.　As　a　result,　Dy　element　in　the　dual-main-phase　magnet　is　fully　utilized.　In　the　single-main-phase　magnet,　the　Dy　element　replaces　the　Nd　element　to　form　the　(Nd,　Dy)2Fe14B　phase.　However,　the　remaining　non-magnetic　Dy　element　from　DyHx　concentrates　in　the　grain　boundary,　it　reduces　the　magnetic　properties　of　magnets　and　leads　to　the　waste　of　Dy　elements.　The　results　show　that　the　dual-main-phase　structure　can　control　the　diffusion　of　Nd　and　Dy　elements,　optimize　the　distribution　of　Dy　elements,　effectively　increase　the　utilization　rate　of　Dy　elements　and　improve　the　comprehensive　magnetic　properties　of　sintered　magnets.　©　2022　Elsevier　Ltd