The　effects　of　soft　phase　with　different　particle　sizes　and　distributions　on　the　Nd2Fe14B/alpha-Fe　nanocomposite　magnets　have　been　studied　by　the　micro-magnetism　simulation.　The　calculated　results　show　that　smaller　and/or　scattered　distribution　of　soft　phase　can　benefit　to　the　coercivity　(H-ci)　of　the　nanocomposite　magnets.　The　magnetization　moment　evolution　during　magnetic　reversal　is　systematically　analyzed.　On　the　other　hand,　magnetic　properties　of　anisotropic　Nd-Fe-B/alpha-Fe　nanocomposite　magnets　prepared　by　hot　pressing　and　hot　deformation　methods　also　provide　evidences　for　the　calculated　results.