Abstract: In order to explore the influence of windward angle on the aerodynamic performance of ski jumpers, the CFD (computational fluid dynamics) numerical simulation method was used to study the aerodynamic performance changes of a multibody system under the condition of wind speed of 29 m/s in six situations: windward angle of 15°, 20°, 25°, 30° 35° 40°. It is concluded that: under the condition of ensuring that the attitude and flight speed of ski jumpers are fixed, the lift-to-drag ratio of the entire multi-body system increases first and then decreases with the increase of the windward angle, and the lift-to-drag ratio of the entire multi-body system varies greatly between different wind attack angles. At an angle of attack of 15°, the aerodynamic performance of the entire multibody system is optimal, which can provide some kind of guidance for ski jumpers' training.