Abstract:Abstract：National heavy metals detection standards were reference and the content of heavy metal Pb，Cd，Cr，Cu，As and Zn in soil and leafy vegetable samples by atomic absorption spectrometry were tested to assessment the heavy metal pollution in soil of the chemical zone and leaf vegetables of coriander，pakchoi，lettuce，and spinach.In addition，the single factor pollution index，comprehensive pollution index and potential hazard ecological pollution index was applied to evaluate the safety aimed at provided the scientific basis of prevention and control of soil heavy metal pollution in farmland and suburb.The results showed that potential ecological risk index of heavy metal was 163.53 and 155.54 in machinery and chemical plants，respectively.There is a slight effect on local ecological environment and the index of pesticide plants and chemical fiber factory were less than 150，at the level of slight and have little influence for local ecological environment.The content of soil heavy metals in four sampling areas exceeded the second-class national soil environmental quality standards by three heavy metals：Cu，Pb and As in the machining plant，and Cu and Cd in the pesticide plant and chemical plant respectively.The vegetables heavy metals content at four sampling points also tested.The study showed that the pollution of Cu on vegetables was the best serious than other metals，followed by Zn and Pb，which exceeded the vegetable standard limit value only a trace amount.The contamination level of the vegetable plots were machining plant on the pollution warning line，pesticide plants and chemical fiber plants in a safe range，chemical plant in a safe range partly near four sampling areas.