Compared with the traditional voltage source inverter (VSI) and current source inverter (CSI), Zsource inverter had the ability like buckboost conversion and no dead time was needed in phase legs,so high reliability could be achieved. A space vector pulse width modulation (SVPWM) technique was modified to realize the shootthrough zero vectors in the Zsource inverter(ZSI). The Zsource inverter could generate a more ideal sinusoidal AC output voltage and step up the DClink voltage in any multiple. For the Zsource inverter, the traditional control strategy often used the double loop PI control of outer voltage loop and inner current loop. It was hard to achieve higher control accuracy while using the control of traditional double PI loop and the harmonic distortion rate of gridconnected current was high. According to the limitations of traditional PI control, a fuzzy PI controller was proposed. The controller took advantage of fuzzy control to adjust the PI parameter online according to the error, so as to meet the requirments of optimal performance. Through the simulation experiment the effectiveness and validity of the proposed method were verified.