The factors that affect the performance of maximum power point tracking（MPPT）control are divided into two major aspects，the dynamic performance of wind turbines and the requirement for tracking maximum power point.Centered on the two aspects，several specific factors are selected from wind speed characteristics and the structure of wind turbines，including the average value and turbulence intensity of wind speed，air density，inertia and radius of rotor and the optimum tip-speed ratio.Based on simulation，the effects of these factors on the performance of MPPT control and their mechanism are then investigated by the quantitative relationships between the factors and the coefficients defined in the two types of improved power signal feedback methods.Research results show that the MPPT performance can be modified by the change of both the wind speed condition and structure parameters of wind turbines.Therefore，the effects due to the above factors need be thoroughly considered before optimizing the controller parameters in the design and application of MPPT control.Results obtained will contribute to further improvement of MPPT control.