Abstract: In order to enhance the EMI suppression capacity of the LCL-LC-type grid-connected inverter and solve the resonance issue introduced by the high-order filter, a modified LCL-LC topology with an active damping method is designed. The scheme begins with splitting the traditional LCL-LC filter symmetrically, then the midpoint of the split capacitors is connected to the neutral point of the DC-side capacitors for providing a low-impedance loop for the conducted EMI. Meanwhile, the active damping strategy with grid-side and capacitor-branch currents feedback is applied to stabilize the system, furthermore, a system-calibration method is proposed to design the controller parameters for such a high-order system. The research shows that the proposed strategy can not only maintain the original satisfied harmonic attenuation of the LCL-LC filter, but also significantly improve its EMI suppression performance. In addition, the designed double closed-loop controller can effectively restrain the resonance of the system and enable the steady-state performance indicators to meet the design expectations. This proposed scheme can provide a possible guidance for the optimization design of the EMI and controller in a grid-connected inverter.