Taking the typical urban soil of Tongchuan City of Shaanxi Province as the research object, the morphological distribution characteristics, environmental migration and potential ecological risk of anthropic elements Pb, Cu, Cr, Zn were investigated by the modified BCR(the European Community Bureau of Reference) sequential extraction method and Hakanson potential ecological index method, respectively. The desorption characteristics and leaching kinetics of Pb, Cu, Cr, Zn by EDTA, DTPA and Vc were conducted with batch experiments for 24 h at 25℃. The results showed that the pollution from heavy metals Pb, Cu, Cr, Zn in soil of Tongchuan City industrial park was serious, and potential ecological risk was strong. The trend of heavy metal Zn and Cu mobility was high. The leaching kinetics experiment indicated that there were the similar processes in leaching and desorption of Pb, Cu, Cr, Zn by organic acid EDTA, DTPA and Vc, however, the leaching speed and desorption quantity were different with different acid. The sum of Pb, Cu, Cr, Zn in soil had a exponential function with their corresponding leaching and desorption concentrations by APCAs EDTA and DTPA, but had the linear function with those of Vc. The results would further infer that the mechanisms of leaching kinetic were different between EDTA, DTPA and Vc.