Fiftyeight samples of surface farmland soils collected from suburbs of Zhangziying in Daxing district,were monitored for total contents of 8 heavy metals by a accumulative index.Results showed that the average concentrations of Cu,Zn,Cr,Pb,Ni,As,Cd and Hg were 23.1,59.6,61.8,19.5,23.8,4.7,0.16 and 0.07 mg·kg-1 respectively.All of which were below soil environmental quality standard class Ⅰ.But average concentration of Cu,Zn,Cr and Cd exceeded the background value of Beijing area.At the same time,Correlation analyses showed that the five heavy metals(Cu,Cr,Zn,Ni and Cd)probably came from the same recourses,and so did of Zn and Hg,Cr and Pb.According to the soil heavy metals environmental quality standards classⅠ,the Nemerow aggregate pollution index of all the heavy metal was 0.70,and the single factor index was in order of Cd＞Cr＞Cu＞Zn＞Ni＞Pb＞Hg＞As.The Nemerow indices of soil in bare vegetable field,greenhouse vegetable field,grain crop field and fruit field were 0.88,0.91,0.61 and 0.59,respectively.The spatial distribution characteristics of heavy metal was northcentral higher than the south,especially the central region exhibited the highest levels.As a whole,most of the soil environment quality was at safe level and the pollution of heavy metal for some areas was at the alert level.