Collection 314 samples of citrus fruits, rice, three-colored amaranth, asparagus lettuce, green Chinese onion, French bean, hot pepper, wild cabbage and the soil, test the content of heavy metal Pb, Cd, Hg and As in these samples. By direction difference analysis and clustering analysis, the accumulating ability of citrus pulp, wild cabbage, hot pepper, French bean is very small in the 8 kinds of agricultural products. It is fit to plant citrus pulp, wild cabbage, hot pepper, French bean in the soil where there is higher content of Pb, Cd, Hg and As.