The atomization of the liquid film formed by impinging jets on a curved wall plays a significant role in engine combustion. And the atomization process can be affected by the shape and thickness profile of the liquid film. In order to investigate the main characteristics of the curved liquid film under different gravity angles, airflow velocities, and airflow pressure, the thickness, and shape and thickness profile of the liquid film were investigated experimentally based on LEDIF (LED induce Fluorescence) with a high-speed camera. The results show that as the gravity angle θ increases, the length of the film increases linearly, and the width of the film increases till the critical width. And as the gravity angle θ increases, the thickness profile along the center line decreases. As the airflow velocity U_air increases, the length of the liquid film increases significantly. And the width of the film decreases as the airflow velocity U_air increases when U_air≤ 30m/s, and increases when the U_air> 30m/s. When the gravity angle θ=30° and the U_air≥40m/s, the gravity can be ignored. As the airflow velocity increases, the thickness profile increases when x≤51mm, decreases when x>51mm. The length of the film increases linearly as the airflow pressure P increases, and the width of the film is almost kept unchanged. As the airflow pressure P increases, the thickness profile is almost kept unchanged when x≤40mm, and decreases slightly when x>40mm.