Wetland is a transitional zone between the water and the land.Changing redox is the most common process which is brought about by alternation of wetting and drying in the wetland.Oxygen diffusion occurring in the roots of wetland plants further strengthens the process.Fe is one of main elements involving in reduction and oxidation soils.Its change can indicate wetland environment.This review introduced the distribution and transformation of Fe and influencing factors Fe cycling, analyzed its effect on wetland soil formation, physiological ecology of wetland plants, material cycling in wetland and environment indicators.Finally, further researches on Fe cycling in wetland were proposed.