Abstract: Aiming at the problems of multiple resonant circuits and complicated parameter design in the wireless power transmission system with double-sided LCC compensation topology (DLCC-WPT), the circuit mode of the DLCC-WPT system was analyzed, and energy transfer coefficient of the system was defined from the perspective of the energy transmission path. The mathematical model of system voltage gain and current gain based on energy transfer coefficient and equivalent quality factor of circuit was established, the reasonable design range of energy transfer coefficient and equivalent quality factor of circuit was determined, and the working area of the power devices in inverter circuit to realize zero-voltage- switching (ZVS) was divided by the current gain curve. A simulation model and experimental prototype were built on this basis to simulate and experimentally verify the parameter design range and working area in the theoretical analysis. The experimental results show that the transmission efficiency of 90% is achieved at the input power of 790W, and the soft-switching of power devices in inverter circuit is realized at the same time.