Abstract: In the distribution grid and the micro grid, compared to a three-phased three-wired system, the existence of an additional zero-sequence path in a three-phased four-legged grid-connected inverter system may cause a high-frequency resonance, which makes the existing high frequency resonance suppression methods inapplicable. This paper analyzes the causes of high-frequency resonance when a three-phase four-leg inverter with a single inductor filter is connected to a grid with parallel compensation capacitor. In order to suppress the high frequency resonance caused by the positive-sequence, negative-sequence and zero-sequence component, an impedance reshaping strategy based on the current feedback applied to a three-phased four-legged grid-connected inverter is proposed in this paper. This method simultaneously regulates the amplitude and phase of the positive-sequence, negative-sequence and zero-sequence impedances in the high frequency band, ensuring the sufficient phase margin of the inverter in the high frequency band. Theoretical analysis and experiments verify the correctness of the proposed control strategy.