Abstract: Taking the new variable pitch wind turbine as the research object,aiming at its unique variable pitch regulating mechanism,through the wind tunnel test method,the IMC load test system was used to carry out the load test on its key components. The test results show that with the increase of pitch angle,the bending moment of blade root decreases,but the reduction effect of axial bending moment is more obvious than that of circumferential bending. The force in the pitching direction is greater than that in the lateral bending direction,and when the wind wheel speed is about 243.5 r/min,the lateral bending force of the tower increases suddenly. Under different pitch angles,the load of measuring points on the rack and rack synchronous disk of the variable pitch regulating mechanism has the same trend with the wind speed,but with the increase of pitch angle,it increases first,then decreases and finally increases.