Abstract: The glass fiber reinforced resin composite material for wind turbine blade was prepared by vacuum infusion method and the microstructure, mechanical and erosion-wear properties under gas-solid two phase flow were also studied. The results show that the tensile curve of the composite material was in accordance with Weibull distribution and no obvious yield point was observed before fracture. The tensile strength of the composite material with 6 fiber layers was 456.87 MPa and of 12 fiber layers was 646.69 MPa. The elastic modulus of the composite material was 4 720.36 MPa. The erosion rate of the composite material increased with the increase of impact angle and velocity of the erosion particles, and showed a decreased fluctuation with the increase of the particle size.