The　KNbO3　(KN)　nano　powders　were　prepared　by　a　developed　sol-gel　process,　in　which　a　new　soluble　niobium　solution　was　used　as　the　Nb　source　instead　of　the　high　price　niobium　alkoxides.　The　phase　formation,　structure　and　morphology　of　the　KN　powders　were　investigated　by　XRD,　FTIR,　and　TEM　techniques.　The　experimental　results　show　that　pure　orthorhombic　phase　KN　nano　powders　are　obtained　when　the　calcination　temperature　is　600　degrees　C　by　the　novel　sol-gel　process,　which　is　more　than　200　degrees　C　lower　than　solid　state　reaction.　The　obtained　KN　powders　are　club-shaped,　and　the　KN　rods　have　diameters　of　100-200　nm　and　lengths　of　1-3　mu　m.　The　synthesis　mechanism　of　nano　rods　of　KN　is　also　discussed.