The invention provides an ECPT (Electric-field Coupled Power Transfer) system based on bilateral LC networks. A parallel LC network is applied to a transmitting end of the system, output voltage of a full-bridge inverter circuit is enhanced to a high voltage value needed by a coupling mechanism, a series LC network is applied to a receiving end of the system, output resistance is subjected to impedance transformation, and thus, in a condition of the same coupling mechanism excitation voltage, the transmission power and the efficiency of the system are higher, and on the basis, a parameter designing method for the system is provided; and on the premise of the same transmission power, compared with a higher-order ECPT system, the transmission efficiency of the system is higher, and the parameter sensitivity is lower.