Fe　nanoparticles　prepared　by　sonochemical　treatment　of　carbonyl　iron　were　applied　to　coat　micrometer　sized　Nd2Fe14B　permanent　magnetic　powder.　The　composite　powders　were　then　prepared　into　bulk　nanocomposite　Nd2Fe14B/α-Fe　magnets.　By　using　spark　plasma　sintering　(SPS)　technique,　the　magnets　with　the　nominal　Fe　content　(mass　fraction)　of　5%　bares　optimal　magnetic　properties　of　Br0.86　T,　Hci　683.8　kA/m　and　(BH)max　95.92　kJ/m3　were　prepared.　A　high　ball　milling　pretreatment　to　the　composite　powders　is　helpful　for　obtaining　magnets　with　fine　grains　and　even　microstructure.　As　a　result,　the　Br　and　(BH)max　of　the　magnet　increase　to　0.94　T　and　113.6　kJ/m3,　respectively.