Aiming at the problem of the resonant frequency drift and the amplitude instability of the transducer during operation, a method of achieving stable amplitude and frequency tracking simultaneously is studied.The amplitude and phase of the complex impedance of the matching network is analyzed by the orthogonal correlative method, the frequency and amplitude of the output voltage of the ultrasonic generator is regulated by the proportional integral differential (PID) control algorithm,then the frequency tracking and vibration stabilization is achieved.The experiment on the frequency of 28 kHz transducer is carried out and it indicates that the combination of orthogonal correlative method and PID control algorithm can achieve the frequency tracking and vibration stabilization of transducer.