At present, with the rapid development of chemical fertilizer, petrochemical industry and other industries, the resulting high ammonia nitrogen wastewater has become one of the restricting factors for the development of the industry. It is reported that in 2001, there were 77 red tides in China's sea area, and ammonia nitrogen was one of the important causes of pollution, especially the pollution caused by high concentration ammonia nitrogen wastewater. Therefore, economic and effective control of high concentration pollution has become an important topic for environmental protection workers, and has been highly valued by the industry. The formation of ammonia nitrogen wastewater is generally caused by the co-existence of ammonia and inorganic ammonia. Generally, the main source of ammonia nitrogen in wastewater with pH above neutral is the joint action of inorganic ammonia and ammonia water. Under the acidic condition, the ammonia nitrogen in wastewater is mainly caused by inorganic ammonia. There are two main components of ammonia nitrogen in wastewater, one is ammonia nitrogen formed by ammonia water, the other is ammonia nitrogen formed by inorganic ammonia, mainly ammonium sulfate, ammonium chloride and so on.