Soil samples on Xiaojiang watershed water-level fluctuation zone in the Three Gorges Reservoir Area were collected for the study.By simulation incubation and chemical analysis,the basic physical-chemical properties of soils and the changing forms of heavy metals (Fe2+,Mn2+,available Cu and Zn) were examined in continuous anoxic conditions.The results showed that flooding increased the contents of the Fe2+,Mn2+,available Cu.The contents increased on average from 58.88,35.26,0.96 mg/kg to 1 383.8,782.7,1.73 mg/kg,respectively.After 15 days’ flooding,the contents of available Zn in both Gaoyang and Yanglu increased at the rates of 12.18% and 10.15%,but the other forms decreased at the rates of 7.12% and 3.69%.After 30 days’ flooding,the contents of available Zn increased with the increment rate ranging from 10.9% to 46.6%.The changing form of heavy metals were influenced by the basic physical and chemical properties of soils.