The paper took hardener to conduct the sediment of stabilization and solidification to contaminated sediment of heavy metal such as Cd, Pb, Zn and Mn in acidic environment,and studied the variation law of curing sediment permeability coefficient and leaking law of heavy metal.The results show that in early penatration, the permeability coefficient and leaching concentrations of Cd and Zn increase gradually,the seepage of Mn first decreases and then increases. After 15 days, all of seepages decrease gradually.The leakings of Cd and Zn have inhibitory effect on the seapage of Mn.The seepage of Pb is zero.When EDTA is added,the permeability coefficient and leaching concentration of Mn decrease gradually and tend to be stable after 30 days.The seepages of Pb, Cd and Zn increase at first and decrease after 15 days.The seepages of heavy metals raise substantially but the highest efflux of toxic heavy is far less than the national leaching limit, and the stabilizated/solidificated effect is remarkable.