Abstract: Based on the Beijing-Shanghai Railway Line, the simplified train-viaduct model for computation is established. According to broadband noise source method and acoustic analogy theory, the intensity characteristics of near-field aerodynamic noise sources and the spatial distribution characteristics of far-field aerodynamic noise of the train running on the viaduct at high speed are studied by using Fluent software. The results show that along the longitudinal direction of the viaduct, the intensity of aerodynamic noise is maximum at the junction of train tail and body, followed at the junction of train head and body; along the transverse direction of the viaduct, the intensity of aerodynamic noise decreases continuously at a slower rate with the increase of transverse distance from the viaduct; along the vertical direction, the aerodynamic noise energy is the strongest at the location of 1.2 m above the top surface of the rail.