The advanced LZA negative pressure ammonia absorption technology is adopted to treat high ammonia nitrogen wastewater. Combined with the recycling ammonia absorption system, the recycling of ammonia nitrogen resources can be realized. High quality industrial ammonia water ( the concentration > 18%) can be recovered. The qualified discharge of ammonia nitrogen wastewater can be reached at low cost. the technology provides a new and efficient approach for ammonia nitrogen polluting enterprises to realize clean production and waste recycling.