Ammonia nitrogen has a high oxygen consumption. It is toxic to aquatic organisms and can stimulate its entropy change. Therefore, the country has strict environmental protection emission limit requirements for such wastewater. At present, the treatment of this type of wastewater mainly adopts stripping, turning point chlorination and MAP chemical precipitation. Our company combines many years of engineering practice to study and compare different processes, and develops in cooperation with scientific research institutions. Based on the two-dimensional electrode method, we have successfully developed a three-dimensional electrode method ammonia nitrogen treatment device. The device has a simple structure, a small footprint, Features such as convenient management, small sludge volume, and low treatment costs.