The　Fe2O3　micro　nanotubes　were　prepared　by　oxalic　acid　treatment　for　several　hours　and　thermal　oxidation　at　400°C　for　2h.　The　surface　morphology　and　composition　of　products　have　been　characterized　by　environment　scanning　electron　microscope　and　X-ray　diffraction　respectively.　The　results　of　ESEM　and　XRD　showed　that　the　FeC2O4·2H2O　micro　nanotubes　completely　transformed　to　Fe2O3　micro　nanotubes　with　the　diameter　of　about　1μm　and　pipe　thickness　of　about　100nm.　On　the　top　of　the　micro　nanotubes,　there　were　nano　tips　in　diameter　of　about　20nm.　The　field　emission　properties　of　Fe2O3　micro　nanotubes　were　evaluated　that　the　micro　nanotubes　had　good　field　emission　with　low　turn-on　field　(about　2.34V/μm),　low　threshold　field　(about　6.80V/μm),　high　field　enhancement　factor　of　10347　and　good　luminous　effect.