Due to the existence of power electronic devices and non-linear loads in microgrids, the power quality problem of microgrids can not be neglected. As the distributed power grid-connected inverter is essentially a three-phase full-bridge circuit, the inverter can not only delivery power, but also control the power quality problems actively. In view of this thought, an active harmonic control method based on one-cycle control is proposed to suppress the current harmonics at the points of common coupling. Aiming at the situation of multiple inverters in parallel, a control strategy of output current apportion compensation is proposed, and the traditional one-cycle control is simplified and improved. Corresponding simulation model set up in Matlab/Simulink and experiments based on dSPACE verify the correctness and validity of the proposed method.