The　synthesis　of　nanoscale　arrays　of　magnetic　particles,　which　may　be　used　in　magnetic　recording　devices,　has　attracted　considerable　interest　recently.　The　coral-flake　Co　particles　were　electrodeposited　into　the　pores　of　the　porous　NiAl　matrix.　Compared　with　the　nonanodized　samples,　the　anodized　samples　in　H3PO4　solution　formed　thicker　Al2O3　during　the　production　of　ordered　Co　particle　arrays　into　the　porous　NiAl　matrix.　The　deposition　at　a　negative　potential　resulted　in　increased　i(max)　and　decreased　t(max).　The　diameter　of　Co　particles　increased　with　increasing　deposition　time.　The　interspace　of　Co　was　consistent　with　the　interspace　of　pores　distributed　in　the　NiAl　matrix.　The　coercivity　(H-c)　and　the　ratio　of　remanent　magnetization　to　saturation　magnetization　(M-r/M-s)　decreased　with　increased　growth　rate　of　the　porous　NiAl　matrix　at　the　same　deposition　time.　H-c　and　M-r/M-s　also　decreased　with　the　prolonged　deposition　time　due　to　increasing　Co　size.