Nd-Fe-B/alpha-Fe　nanocomposite　magnets　with　high　magnetic　properties　were　successfully　fabricated　through　a　sonochemical　process　with　carbonyl　iron　as　Fe　precursor　and　subsequently　SPS.　Experimental　results　show　that　alpha-Fe　can　increase　the　remanence　of　Nd-Fe-B/alpha-Fe　nanocomposite　magnets　while　decrease　the　coercivity.　The　demagnetizing　curve　indicates　that　the　hard　and　the　soft　phases　did　not　coupled　very　well,　even　though　the　remanence　was　improved.　The　magnetic　properties　of　Br　8.61　kGs,　Hcj　8.59　kOe　and　(BH)(max)　12.05　MGOe　were　obtained　for　Nd-Fe-B/a-Fe　nanocomposite　magnets　with　the　nominal　Fe　content　of　5　wt.%.　It　is　noted,　the　exchange　coupling　was　obviously　enhanced　by　a　MA　process　before　SPS,　and　the　magnets　properties　were　increased　to　Br　9.42　kGs　and　(BH)(max)　14.27　MGOe　for　Nd-Fe-B/alpha-Fe　nanocomposite　magnets　with　the　same　Fe　content.