Abstract:The paper introduces the application of electrochemical oxidation,micro-electrolysis techniques and electrodeionization in the treatment of highly complicated wastewater as well as in wastewater treatment of electric power plant,analyzes the reaction mechanism of the electrochemical water treatment with the advantages of easy operation,easy automation and good environmental compatibility. It is pointed out that it will be an important direction of the electrochemical water treatment techniques to use the combined features,in order to reach the destination to improve the treatment efficiency and to reduce the expense as much as possible.