Based on the dynamic optical path delay device with different positions and the entangled source signals at Roland C main station as well as the phase difference information of entangled light fields with different paths detected by the main station unbalanced M-Z (Mach-Zehnder) interferometer, the synchronization time difference information of Roland C main and auxiliary stations is obtained. The theoretical and simulation results show that the optimal time difference information with a precision of tens of picoseconds is obtained when the phase difference is 0.5π. Compare with the original master-slave synchronization, free synchronization and others, the proposed scheme does not need to measure the pulse arrival time. Moreover it can break through the quantum noise limit and effectively improve the time measurement accuracy.