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In order to realize the control of the inverter in the wireless charging system of electricvehicle,compared and analyzed the characteristics of phase-shift control and frequency-varied control for high frequency inverter, a novel kind of control strategy which combined phase-shift and frequency-variedand based on DSP and FPGA control hardware platform was proposed. This paper mainly describes the design of hardware language and the realization principle of real-time phase-shift and frequency modulation based on FPGA, and puts forward a method to avoid the narrow pulse which is easy to appear in this principle. Finally, it is verified in the wireless charging device of electric vehicle.It realizes the seamless switching of PWM wave after frequency and phase updating and the control function of high-frequency inverter in the system, by adjusting the phase-shifting Angle, the device can work stably in different power ranges with efficiency greater than national standard requirements of 92.5%, which proves the correctness of the control technique and realizes the demand of actual engineering.