The present invention discloses a vibration reaction force active balancing device for a vibration-acceleration test device. The vibration-acceleration test device comprises a centrifuge, a vibration table and a balancing weight; the vibration table and a balancing weight are respectively installed at two ends of the pivoted arm of the centrifuge; in the vibration reaction force active balancing device, an excitation electromagnet is fixedly installed at one end of the pivoted arm of the centrifuge and is located at the outer side of the balancing weight; a plurality of control electromagnets is installed at the position having the same height as the excitation electromagnet and is distributed around the rotation virtual circle of the excitation electromagnet; two force sensors are installed on the pivoted arm, signal output ends of the two force sensors are connected with a signal conditioner, a detection controller two power amplifiers in order, and the signal output ends of the two power amplifiers are respectively connected with the excitation electromagnet and the control electromagnets. The vibration reaction force active balancing device for vibration-acceleration test device performs active balance of vibration reacting force generated by a vibration table so as to realize a remarkable force balance effect and achieve the purpose of reducing the vibration of the main shaft of a centrifuge.