Abstract: According to the characteristics of the northwest China sandstorm activities,the scaling model blades of 1.5 MW wind turbine were tested,the device that used to erode by wind-sand flow was designed,and the pressure side of blades were eroded along chordwise and spanwise areas respectively. The vehicle test was used to test the eroded wind turbine blades,and the influence of nonuniform erosion features on aerodynamic characteristics was studied in different regions of blades. Results show that output power of wind turbine and aerodynamic performance decrease under small installation angle on the leading edge erosion blades,and the windpower utilization coefficient（ CP）decreases more obviously when the installation angle is 31.7°. Output power and CPall decrease under small installation angle on the half erosion blades of spanwise areas,while the installation angle increases,the aerodynamic performance improves. The positive effect is found under small installation angle on total erosion blades of spanwise areas,while the installation angle increases,aerodynamic performance deteriorates.