The supply side heats such as the exhaust temperature of the ovens and purification equipment was optimized,so the chimney temperature of the ovens at full load was reduced to 110〜130℃,and near zero energy consumption of the purification equipment was achieved.At the same time,from the demand heat side,the energy consumption of degreasing in pre-treatment was analyzed,and it was expected that through the application of low-temperature degreasing,natural gas of the boiler will reach nearly zero consumption.It saves 2.84 million m^(3) natural gas and reduces 5566 tons C0_(2) emissions each year through all the above measurements.