Abstract: Aero-train is a new transportation with high speed and low energy consumption is based on the wing-in-ground effect (WIG).The Aero-train concept proposed Tohoku University in Japan in the first place and the relevant research carried out the support of the Japanese government. In this paper, the aerodynamic optimization design of LA203A is carried out by using genetic algorithm and numerical simulation method.the simulation analysis ground effect optimized airfoil, the influence of the ground clearance and the attack angle on the drag, lift and lift drag ratio of the -train and the aerodynamic characteristic is improved.CFD technology to the aerodynamic characteristic of AERO-1 with wings and optimized wings and the flow field characteristics around the front and rear wing. the aerodynamic characteristics of Aero-train with optimized wing, the wind tunnel test was in Jilin University. The lift-drag ratio of optimized airfoil which optimized by genetic algorithm method is 26% higher than the airfoil. The provides theoretical basis for the analysis of wing-in-ground effect and the research Aero-train.