Puts forward power control strategy of direct-drive permanent magnet wind generators. Introduces main circuit and the control structure of grid-side and generator-side inverters, and adopts SVPWM control mode to control the desired IGBT switch signals sent out by the converters. Establishes back-to-back system simulation model with Matlab/Simulink software and makes simulation analysis, and conducts the towing test. The results show that the simulation is consistent with the test waveforms, verifies the strategy is capable to effectively control the input active power and reactive power and can make full use of wind energy.