A pot experiment was conducted to study effect of addition of EDTA on leaching of the Total Organic Carbon (TOC) and heavy metals from a polluted soil. Results indicated that, EDTA extra-remarkably increased the concentration of TOC in the soil leachate. The concentration, however, declined, showing an exponential curve, along with the increasing volume of leachate. On day 48 after the addition of EDTA, it was still higher than that in the control. EDTA increased the concentrations of Cd and Ni by a large margin; but they dropped rapidly within 1 month and then leveled off. The use of the EDTA technology does have an environmental risk of heavy metals migrating into the groundwater. The crucial time to prevent pollution of ground water in applying the EDTA technology is the first two weeks after its addition.