In the large-scale direct drive wind turbine, it usually changes the pitch to improve the utilization of wind energy and adjust the active power of generators. However, as the randomness of the wind speed and the nonlinear characteristic of the wind turbines, the traditional PID control algorithm can not obtain satisfactory results. For this reason, a fuzzy Smith predictor control method is proposed. Based on the fuzzy theory and Smith predictive control theory, the fuzzy controller and Smith predictor controller is designed, finally the both are combined, the model is set up by Simulink, and the simulation verification is performed. Results of simulation show that when the wind speed exceeds the rated wind speed, the proposed method can make the fan speed stable in ratings by controlling the pitch angle and achieve the constant power control of direct drive wind turbine.