In this paper, working principle of direct-driven wind power grid inverter was studied, on the basis of analyzing the mathematical model of the grid-connected inverter was deduced. A feedforward decoupling double closed loop control strategy was proposed,and the space vector pulse width modulation (SVPWM) method was analyzed. So that,the output current is effective controlled,whose waveform is sinusioidal ,the frequency and phase are the same as the grid voltage.Thus this method greatly reduces the powers of hamonic pollution,improves the performance and reliability of the inverter,and lastly raises the efficiency and reliability of wind power system.Meawhile ,this method was modeled and simulated in Matlab/Simulink software, the simulation results verified its feasibility and correctness.