Abstract: It is difficult to construct a uniform wind sand flow field and accurately reflect the wind sand wear characteristics of wind turbine blades using the traditional sand erosion test-bed and wind sand wind tunnel. Therefore, in this paper,the coating erosion wear tests are carried out on the flat plate samples of wind turbine blades in the modified wind-sand wind tunnel. The influence of different impact velocity,impact angle and effective cross-sectional mass flow rate on the erosion characteristics of wind turbine blade coating materials is researched. The experimental results show that when the effective particle mass flow rate is constant, the impact angle is about 30° under the same impact velocity and impact time, the wear loss reaches the maximum. When the impact angle is less than 30°,the wear loss increases rapidly with the increase of impact angle,and when the impact angle is greater than 30°,the wear loss decreases gradually with the increase of impact angle;The wear loss increases with the increase of impact velocity,and increases linearly with the increase of effective particle mass flow rate. The cutting wear has the same trend as the total wear,and the impact wear increases with the increase of impact angle.