Abstract: In oder to suport a new way for the metal-contained wastewater from metallurgical plants,in this paper the new combined flocculation process of the micro-electrolysis with high carbon sponge iron (including 13.00% C,55.40% Fe) was used to treat the metal-contained wastewater from lead-zinc metallurgical plant,and the influence of pH,reaction time,and consumption as well as particle size of sponge iron on the removal effect of lead and zinc ions in acid wastewater from Pd-Zn smelting plant were also researched systematically and deeply.The results showed that the removal effect of lead ions and zinc ions in wastewater was optimum and the electrochemical removal rates of them were 98.87% and 77.89% respectively,the ion removal rates of copper,total cadmium and arsenic in waste water were 93.50%,9 1.50% and 47.26% respectively when the initial pH of wastewater was 3.0,the consumption and particle size of sponge iron were 30 g/L,0.301 mm respectively,and the reaction time was 40 min.Under optimal conditions by using micro-electrolysis and flocculation process,the removal rates of lead and zinc reached 99.90% and 99.67% respectively,at the same time,the total arsenic ions,cadmium ions and copper ions were further removed,the total removal rates of them were 97.77%,99.56% and 97.77% respectively.The wastewater after the treatments could reachIntegrated Wastewater Discharge Standard"( GB 8978—1996 ) in requirements of primary standard in China.