The invention discloses an active power filtering device, and relates to the field of the electrical technology. The active power filtering device comprises a main circuit, a signal collecting and controlling system, a driving part and a power supply part. The main circuit is composed of a breaker, a contactor, a filter inductor, a mutual inductor, an IGBT inverter, current-limiting resistors and two bus capacitors, wherein the breaker, the contactor, the filter inductor, the mutual inductor and the IGBT inverter are connected in series in sequence, the current-limiting resistors are connected at the two ends of the contactor in parallel, and the two bus capacitors are connected in series and are connected at the two ends of the IGBT inerter in parallel. The signal collecting and controlling system and the driving part are connected in sequence. The power supply part is connected to the two ends of the bus capacitors and is in power supply connection with the control system and the driving part. 20kHz high-speed switches and fly-wheel diodes connected in parallel are arranged inside the IGBT inverter. The driving part is connected with timing hysteresis comparison feedback. The response time of output current can be reduced by the IGBT inverter, 2-60 times of harmonic currents can be filtered out at the same time, timing hysteresis enables generated PWM control signals to be accurate, and filtering and reactive power compensation performance are improved.