The invention belongs to the field of a high-voltage large-power converter, in particular to an H-bridge cascaded multi-level active power filter device. The H-bridge cascaded multi-level active power filter device comprises a main loop, a filtering branch, a soft starting loop and a cascaded unit inversion module, wherein each cascaded H-bridge unit inversion module mainly comprises an insulated gate bipolar transistor (IGBT) module, a driving module, a unit control board, an absorption capacitor, an electrolytic capacitor and an equalizing resistor, the driving module is directly welded on the IGBT module, the unit control board is connected with the driving module through a flat cable and used for proving a pulse width modulation (PWM) pulse signal to an IGBT, the unit control board is connected with an upper computer through an optical fiber and used for receiving an H-bridge driving pulse instruction emitted from the upper computer, the absorption capacitor is connected in parallel to a DC side of each IGBT module, the electrolytic capacitor is connected in parallel to the DC sides of the IGBT module, and the equalizing resistor is connected in parallel to the electrolytic capacitor. In the H-bridge cascaded multi-level active power filter device, all H-bridge unit inversion modules have the same structure, and the H-bridge cascaded multi-level active power filter device is easily and modularly designed packaged.