The invention relates to a grid high-frequency impedance remodeling device for suppressing distributed generation resonance. The remodeling device is composed of a power grid-connected converter and aresonant impedance controller. The resonant impedance controller consists of a resonant detection module and a resonant current tracking module. The resonant detection module detects the voltage upccof a PCC point by a voltage sensor; predetermined circuit processing is carried out on the voltage upcc to obtain resonant voltage components upccr<+> and upccr< > and a resonant frequency omega r; and predetermined circuit processing is carried out on the resonant voltage components upccr<+> and upccr< >, the resonant frequency omega r, the voltage upcc of the PCC point, and a direct-current voltage Udc by the resonant current tracking module to obtain a PWM pulse signal for controlling connection or disconnection of a switching tube of a power grid-connected converter. According to the invention, the grid high-frequency impedance remodeling device is installed at the PCC point and detects the resonant voltage components of the PCC point; the resonant impedance controller including equivalent damping resistance information is used for obtaining a current instruction outputted by the converter; the converter is controlled to track the instruction value; and a virtual variable harmonicimpedance is generated to realize grid harmonic suppression.