The additional phase noise of the microwave optical transmission link seriously deteriorates in strong vibration environments. To address this limitation, firstly, the reasons for the deterioration were initially analyzed. Subsequently, the mechanism of vibration transmission was studied and a math model was established. Simulations and experimental analyses demonstrated that the acceleration sensitivity of the optical link system is on the order of 10^-12 in the low frequency range and 10^-11 in the high frequency range. The experimental results further show that in a strong vibration environment, the additional phase noise of the optical link system deteriorates to about 40 dBc/Hz and at resonance, to about 48 dBc/Hz. By reducing the acceleration sensitivity of the optical system and avoiding resonance, the effect of vibration on additional phase noise can be effectively reduced.