Abstract: An LCL filter has better filtering ability compared with an L filter. However, it is apt to cause resonance issue and lead to instability of the power system. In the grid connected inverter based on LCL, some relevant active damping methods are usually adopted in order to ensure the stability of the system. At present, the widely used active damping with proportional feedback of capacitive current requires the introduction of additional high-precision current sensors, which brings an increase in system costs. Therefore, this paper proposes a new active damping method based on grid current feedback. The damping link is able to provide a certain phase shift for the open-loop transfer function to stabilize the damping loop and achieve a better damping result. Adopting this active damping method will reduce the lower frequency limit of the effective damping region and improve the system's robustness to changes of grid impedance, compared with the traditional single-grid current feedback control. This paper also discusses the design methods of the damping link parameters and the current controller parameters according to the stability margin and the steady-state accuracy of the system. It also lists convenient design steps of the parameters. Finally, simulation and experimental results verify the availability of this active damping method.