Wireless Power Transfer (WPT) technology has become a hotspot of research at home and abroad because of its unique transmission advantages. With the in-depth study, there is an urgent need to enhance the output power of WPT system at this stage, for this reason, this paper proposes a dual-frequency channel-based power enhancement method for WPT system. The dual resonant network is used for resonance compensation at the power transmitting end, and through the configuration of its parameters, the WPT system can be made to be in resonance at both the fundamental and the third harmonic frequencies, so that the power at the two frequencies can be transmitted simultaneously. The paper first introduces the overall structure and working principle of the system, and then analyzes the system characteristics to obtain the relationship between the system output power and efficiency and the inverter modulation parameters. Further, the comparisons of power and efficiency between the traditional single-channel system and th