High-frequency inverter technology is widely used in wireless energy transmission systems. The distance change in the high-frequency magnetic induction energy transmission system will lead to the change of resonance frequency and the decreasing of efficiency. A frequency tracking drive scheme based on the 74HC4046AD phase-locked loop is proposed, which can realize the automatic tracking of the resonant frequency. In the proteus environment, the inverter prototype of the inverter power supply based on frequency tracking is designed and fabricated, and the output is tracked and fedback by the prototype. The experimental results show that the output performance of the system is good, the effectiveness of frequency tracking is verified, and the soft switching mode of the power tube is realized.