In full consideration of wind turbine blades suffered various loads, blade dynamics mathematical model containing time-varying uncertain terms and unknown load interference are established, the model accurately describes the nonlinear dynamic behavior of blade system. Blade system model is complex and there are many time-varying uncertainties parameter, for this complex and changeable blade system model, by use of robust adaptive control methods, an independent pitch angle tracking controller is designed. Lyapunov stability theory proves the stability of the system. Using Matlab/Simulink simulation software, wind turbines blade dynamics simulation model are built. Simulation results show that the designed blade pitch angle controller, when the system parameters and suffered interference are completely unknown uncertain and time-varying, are able to fast track the expected pitch angle, and controller shows good robustness.