In order to solve the problems of complicated equipment, large workload and low reliability when building a large frequency transmission network based on fiber link, a novel remote compensation system of frequency transmission was proposed. The system utilized wavelength division multiplexing (WDM) technology, to transmit the signal to the far end via the two branches, and the phase fluctuation was measured by the phase discrimination and correlation calculation, and the high-precision signal was obtained by electrical phase shifting compensation. Simulation results verify the effectiveness of the proposed method. The transmission of 10MHz signals over 25km optical fiber was simulated under the communication window of 1310nm and 1550nm, the synchronization accuracy of the remote signal reaches 0.22mrad.