The basic principle of high precision disciplined time-frequency transfer through optical fiber link, the analysis of error sources and the structure of the disciplined clock system are expatiated. Experiments through 100 km optical fiber are done when the temperature slowly changes and extremely changes. The result presents that the peak-to-peak value of synchronization error is smaller than 400 ps. And the performance of the system can satisfy the demand of high precision and synchronization time transfer between commercial atomic clocks.