The invention discloses a fretting wear test device based on an ultrasonic technology. The fretting wear test device is composed of an ultrasonic generator, a servo electric cylinder, a force sensor,a loading device, a driving device and a data acquisition device; a loading head is pushed by the servo electric cylinder to make contact with fretting pads to apply positive pressure to a test part;and the force sensor acquires a positive signal, sets a computer data processing device to form closed loop feedback control with the acquired positive pressure signal to keep a load applied by the loading device constant. The fretting wear test device is simple in structure and convenient to operate, the various parts are fixed and supported by a bottom plate and a fixing platform, the stabilityis good, and the advantages of being high in reliability and precision are achieved; and a transducer is adopted to convert ultrasonic signals into reciprocating linear mechanical motion of a vibrating head, vibration displacement is amplified by an amplifier to serve as an excitation source for forming fretting wear between a friction pair, the vibration frequency is high, the amplitude is adjustable, the test time can be shortened, and the test cost can be reduced.