Using soil column leaching method, the best leaching conditions have been studied with the organic phosphonic acid PAPEMP, including different ratio of soil to solution, leaching time and leaching frequency on the Cd removal rate, respectively. The research results showedwhen the quality percentage of PAPEMP was 7%, the ratio of soil to solution of 1∶4, the leaching time of 240 min and leaching once, the removal rate of Cd was the highest. PAPEMP can be used in leaching remediation of Cd contaminated soils.