It is reported that phenol in wastewater was degraded by H

2

O

2

with iron oxide as catalyst prepared by deposition.The effects of temperature

pH and H

2

O

2

concentration were investigated.The process of phenol degradation was studied with UV absorption spectrum and high performance liquid chromatogram（HPLC）.The results show that the amorphous iron oxide has a highly catalytic activity and the degradation ratio of COD（Chemical Oxygen Demand） reach maximum in the pH value range from 4.5 to 5.5 and temperature range from 60 ℃ to 65 ℃.The intermadiate products are pyrocatechin

hydroquinone

benzoquinone and low-grade fatty acid.The mechanism of catalyst oxidation is that the free radical（·OH） attack benzene cycle at the adjacent position and para position of OH on phenol.The benzene cycle is opened and lowgrade fatty acid is produced.Then they transformed into CO

2

and H

2

O.The reaction kinetic of phenol degradation was according with pseudo-first order reaction kinetic model.