This paper presents the single-switch three-phase wind power converter with harmonic injection mechanism. In order to obtain optimal output power of the wind turbine generator (WTG) at different wind speeds, a maximum-power-point-tracking (MPPT) mechanism is required. Furthermore, to improve the input power-factor of the wind energy conversion system (WECS), the conventional single-switch three-phase boost rectifier is employed. However, the input current of the conventional single-switch boost rectifier exhibits a relatively large fifth-order harmonic, which leads to low input PF. Therefore, in order to improve the conversion efficiency for WECS, an MPPT mechanism is employed in the single-switch three-phase boost rectifier. Moreover, the input PF of the single-switch boost rectifier can be improved by adopting the harmonic injection mechanism. Finally, a 1kW prototype circuit of the single-switch three-phase wind power converter is built to verify the performances using MPPT and harmonic injection mechanisms.