Wireless Power Transmission (WPT) technology has gained significant traction in recent years. This paper proposes a PI-controlled digital phase-locked loop for LCC-LCC compensated WPT Systems to achieve phase synchronization between primary and secondary voltages. Synchronous rectification is realized by adjusting the driving phase of the rectifier bridge arm switching tubes so as to reduce conduction losses. This paper also analyzes stability, the model of the digital phase-locked loop, and phase synchronization controller parameters for improved stability. Additionally, it examines parameter feasibility. Simulation and experimental results demonstrate faster dynamic response and enhanced steady-state performance with the proposed phase synchronization method.