A resonant driver circuit and control method for high frequency LLC-DCX converter are researched. Through the combination of multi-coupled winding resonant driver and signal multiplexing, lower driver loss and smaller circuit area are achieved at high frequency. By multiplexing switching point signals of the resonant driver bridge as the lower MOSFET drivers, the lower MOSFETs of the driver bridge are self-driven, and the numbers of the MOSFETs in the resonant driver circuit which need to be controlled is reduced from four to two, which still maintaining the same circuit function. The switching point signals of the resonant driver are multiplexed as the lower MOSFETS drivers of the power train, which reduces the number of coupling windings of the driver circuit, avoids excessive coupling windings which affecting the circuit layout. The optimal design method of excitation inductance of resonant driver circuit is proposed to ensure that the dead time of drive signal generated by the driver circuit matches the power circuit. And the ZVS condition of power MOSFET is still achieved. The working principle and design method of the resonant driver which multiplexing the voltage signal of excitation winding are analyzed in detail, and A principle prototype is made to verify the circuit and design method.