The content of ammonia nitrogen and Chemical Oxygen Demand(COD) in coking wastewater cannot meet the discharge and reuse standards through biochemical treatment. Zero discharge of wastewater was acheived by electorchemical degradation using modified lead dioxide electrode (ESIXPb-I). At the same time, the effects of current density, initial pH value and chloride concentration on degradation of coking wastewater were explored. The results show that the ESIXPb-I electrode improves the stability and oxygen evolution potential of the Ti/PbO2 electrode, and significantly reduces the charge transfer resistance and membrane resistance. Furthermore, the removal efficiency of both ammonia nitrogen and COD reaches 100% after degradation of coking wastewater by ESIXPb-I electrode for 30 min, which is in accordance with pseudo-first-order kinetics.