Fiber is one of the important ways to transmit clock signal over a long distance. The vibration of fiber will change the polarization mode dispersion of fiber, which will affect the transmission performance of clock signal. In order to reduce the impact of fiber vibration on clock transmission, the reasons of clock signal transmission degradation caused by fiber vibration are analyzed in detail, and a new anti fiber vibration transmission technology scheme is proposed. The experimental results show that the phase noise can be improved by 10~15 dB.