Coating and drying, as a core step in lithium battery manufacturing, have a decisive impact on the quality of the positive and negative electrode sheets and the efficiency of the entire production process. To study the influence of the position of the air inlet inside the coating oven on the quality of the electrode sheets, this paper establishes a hull model of the oven based on actual geometric dimensions and uses SolidWorks software for flow field simulation analysis. The research primarily investigates the effect of the inlet position on the quality of the electrode sheets. The simulation results show that optimizing the inlet position can effectively improve the uniformity of the flow field, thereby enhancing the coating uniformity and drying effect of the electrode sheets. Specifically, lowering the inlet position helps reduce fluctuations in airflow velocity and temperature distribution, improving the stability of the drying process and significantly enhancing the production quality of the electrode sheets. Furthermore, this study improves the efficiency and product quality of the lithium battery production process, providing important guidance for future process improvements.