The blade of wind turbine is eroded by sand-carrying wind when it runs in wind-blown sand environment,which leads to damage of the surface coating of the blade,reduces service life of the blade,and increases maintenance cost of the blade.In order to investigate the erosion and wear of wind turbine blades destroyed by sand-laden wind,a coating erosion and wear experimental device was developed.It was powered by compressed air and connected with air source through compressed air trachea.The working pressure was set up by the compressed air in the erosion pipe,and the sand and the compressed air were mixed fully in the erosion pipe to form a high-speed sand-carrying wind.The PLC was used to control the rotating speed of stepper motor,and the rate of sediment transport was controlled by the spiral propeller,the erosion wear experiments were carried out to the model surface of the wind turbine blade by spraying the nozzle of the erosion tube.The erosion device can realize the multi-working condition wear experiment of various impact wind speed,sand carrying capacity and impact angle,and can provide more accurate experimental data.