Crystal oscillator output frequency often drifts under vibration. Therefore, based on the analysis of the acoustic active noise control technology and the mechanism of acceleration effect on crystal oscillator phase noise, a method of reducing crystal oscillator phase noise under vibration was proposed. The simulation about the acoustic active noise control system obtained that the theory of acoustic noise reduction can be used in crystal oscillator phase noise reduction. By adding acceleration sensor, analog-to-digital converter, digital-to-analog converter and digital processor in the peripheral circuit of crystal oscillator, the phase noise real time compensation active noise control system was constructed. The results show that the active noise control system achieves 20 dB phase noise compensation under the random vibration of 0.03g/Hz amplitude range and 10~850 Hz frequency range.·