This paper introduces a method and principle of heat recovery from oven exhaust gas utilization through actual project cases,aiming to help reduce energy waste in the coating industry.By recovering and reusing the heat released during the drying process,the energy utilization efficiency can be effectively improved and the operating cost of equipment can be reduced.The project adopts the technology of heat recovery and utilization,converting the heat energy contained in the exhaust gas into a source for preheating fresh air,achieving the reuse of energy.This technology not only improves energy utilization efficiency but also has significant application value in reducing energy consumption in the coating industry.