The urea hydrolysis ammonia production system has been widely used in thermal power plants,but not used in the glass industry.This paper discusses the application of ammonia production by urea hydrolysis in the flue gas denitration system of a glass factory based on the practical example of a glass factory in Jiangsu.The practice shows that the ammonia production by urea hydrolysis system operates stably,has low failure rate,and the ammonia injection volume is continuous and stable,and the export nitrogen oxide can be discharged continuously to the standard,which can be promoted and used in the glass industry.