Abstract: Abstract: The soil incubation experiment was carried out to study the effect on soil microbe and enzymes under Pb addition. The results showed that there are discrepancial effects of heavy metals on soil enzymes. Soil basal respiration increased with increasing Pb leading, however, the activity of urease markedly declined with increasing Pb loading. Dehydrogenase activity slightly increased at low level of Pb and decreased at higher level, which indicated that the two kinds of soil enzymes activity is feasibility to act as index of Pb pollution. There are not statistical regularity between the soil phosphatase activity and Pb addition, which shows that soil phosphatase is not available to act as an index to evaluate Pb pollution.