Samples of fluvo-aquic soils in the Huafei River sewage irrigation region of Kaifeng City were collected for determination of contents of Cu,Zn,Pb,Cr,Cd,Ni and As.The results indicated that sewage irrigation has led to obvious accumulation of heavy metal in the fluvo-aquic soil;the average contents of Cd and As reached 1.70 mg/kg and 26.28 mg/kg,respectively,far beyond the second grade criteria of the national standard for soil quality.Heavy metals entered into the fluvo-aquic soil from sewage and accumulated mainly in cultivated layer of the soil,showing a decreasing trend in concentration with the depth of the soil profile;among the seven heavy metals,As accumulated most easily in the cultivated layer.The contents of Cu,As and Cd in the soil were in linear correlation with distance from the source of pollution.Correlative analysis indicated that the contents of Cu,Zn,Pb,Ni and As in the soil were related to physical and chemical properties of the soil and contents of other heavy metals while the contents of Cd and Cr in the soil were not.