Abstract: To solve the security problem of high-speed train in the high wind environment, the structure of anti-wind corridor was used to withstand wind and sand for the railway. Glass fiber/unsaturated polyester composites were selected as the structure materials because of their the high specific strength, stiffness and corrosion resistance. The tensile and bending properties of composites under different sand erosion conditions were measured to study the influence rules of different sand erosion conditions on the composites. The results show that with the increasing of sandblasting angle, the erosion effect is unobvious. The effect is magnified with the higher wind speed and exposure time and the erosion effect shows linear variation.