This article primarily discusses the principles and structures of air curtain systems commonly used in the drying ovens of automotive painting production lines.Through practical project cases,improvements and innovations are made to the principles and structures of the air curtain system in the drying oven,achieving the separate adjustment and control of the inlet and outlet air curtain temperatures.The energy consumption and maintenance costs of the air curtain system during operation are tracked and recorded,revealing that the improved air curtain system can significantly reduce the operating costs of the drying equipment,thereby achieving the goal of a more energy-efficient drying oven.