The electrochemical wastewater treatment equipment can achieve a removal rate of over 99% for COD and ammonia nitrogen in refractory industrial organic wastewater with high salinity, high toxicity, high concentration and strong acid-base properties. It solves the long-standing problem of treating high-difficulty and complex wastewater in the industrial wastewater treatment industry, and represents a tremendous breakthrough in the treatment scope, methods and effects of such wastewater.