Abstract: To realize the power control of small wind turbines,a new type of adaptively pitch adjustment method is proposed. The theory and working principle of pitch control are analyzed,and the 1.5 kW wind turbine model established by ANSYS Workbench is used to simulate and analyze the wind turbine in different working conditions. Study the relationship between the pitch angle of the wind turbine and the wind speed,the change of the surface pressure of the wind turbine and the stress distribution law of the pitch adjustment mechanism under different working conditions. Simulation results show that the maximum pressure on the surface of the wind turbine,with the increase of the pitch angle and wind speed,the transition from the blade leading edge of the windward surface to the leeward surface. The maximum equivalent stress of the regulating mechanism occurs in the coditions of wind speed 17 m/s,pitch angle 20°,and rotational speed 390 r/min,which occurs at the root of gear,and the maximum stress value increases with the increase of rotating speed.