Abstract: Regarding rapid metro vehicle, the possible aerodynamic effects are described, vehicle design parameters related to aerodynamic effect and their change rules are analyzed in detail. The research shows that with the increase of vehicle speed and cross section, the aerodynamic resistance, amplitude of pressure wave and aerodynamic noise will also increase to varying degrees. Besides, the greater increase of vehiclehead slenderness ratio and carbody surface smoothness, the smaller aerodynamic resistance will be.