In this article,combining the characteristics of the coating process of construction machinery and considering the impact of national environmental protection policies,the coating construction process has also been improved simultaneously.At present,the application of powder coating in the coating of construction machinery is becoming more and more widespread,but the drying temperature of powder coatings is higher.However,the hot plate in construction machinery has a large heat capacity,and the traditional circulating hot air heating efficiency is low,which causes a large waste of energy consumption and affects the production cycle.The gas catalyst infrared heating can effectively improve the drying efficiency and reduce the energy consumption cost,but the gas catalyst infrared heating needs to be fully debugged in conjunction with the structure of the workpiece to achieve the desired effect.