A harmonic energy transfer function modeling method for a multilevel modular converter (MMC) station belongs to the technical field of power transmission. Aiming at the defect that a harmonic energy transfer function of the MMC converter station cannot be acquired due to the adoption of a harmonic injection method to analyze waveform frequency spectrum by the existing flexible DC power transmission system, the harmonic energy transfer function modeling method of the MMC converter station during the harmonic energy transfer process of the MMC converter station of an AC-DC hybrid system is built. The method comprises the following steps of adding a harmonic signal into a multilevel dual-end flexible DC power transmission system, carrying out time domain simulation, extracting data, carrying out curve integral, changing a numerical value of x, drawing an energy curve, calculating the harmonic energy transfer function, and correcting the curve. By the method, the blank of harmonic energy transfer function modeling of the MMC converter station of the AC-DC hybrid system is filled up, and an effective analysis means is provided for research on the electric quality of the AC-DC hybrid system containing the MMC converter station.