Abstract: With the continuous development of China's social economy, people's awareness of environmental protection has gradually improved. At present, the reconstruction and upgrading of the existing backward project facilities has become the most effective means to save resources and improve production efficiency. Based on this, this paper introduces the energy-saving transformation process of the project and its application in the transformation of coal chemical system by using the residual heat of stamping coke oven circulating ammonia water. It has been proved by practice that after the transformation This technology has high economic benefits.