To　obtain　a　better　understanding　of　the　reaction　between　fibrous　materials　and　metal　ions,　the　amidoximed　polyacrylonitrile　fiber　(denoted　as　AO-PAN)　was　used　to　coordinate　with　five　metal　ions　including　Fe3+,　Cu2+,　Co2+,　Ce3+　and　La3+,　respectively,　to　produce　the　amidoximed　PAN　fiber-metal　complexes.　Coordinating　characteristics　of　AO-PAN　with　metal　ions　were　mainly　studied　and　the　effect　of　initial　concentration　of　metal　ions　and　temperature　on　coordinating　capacities　of　AO-PAN　to　metal　ions　was　also　examined.　The　results　indicated　that　when　AO-PAN　coordinating　with　metal　ions,　increasing　the　initial　concentration　of　metal　ions　and　higher　temperature　leads　to　an　enhanced　metal　ion　coordinating　capacities.　Moreover,　reaction　rate　constants　of　five　metal　ions　with　AO-PAN　increase　with　the　elevation　of　temperature,　and　are　ranked　in　the　order　of　Fe3+　＞　Cu2+　＞　Co2+　＞　Ce3+　＞　La3+　at　the　same　condition,　but　their　activation　energy　shows　a　reverse　trend.　The　thermodynamic　characteristics　of　ΔH0　＞　0,　ΔS0　＞　0,　ΔG0