This paper proposes a four-plate coupling structure with a metal mesh isolation between the receiving side and the transmitting side of an electric field wireless power transmission (WPT), establishes the circuit equivalent model of the system. And the Π-type equivalent circuit of the coupled structure is obtained. Using finite element simulation software COMSOL, the three-dimensional model of the coupling mechanism is established, and the relationship between the size of the metal mesh, the diameter of the metal conductor and the parameters of the equivalent circuit is studied by simulation. According to the duality principle, a method for measuring the self-capacitance and mutual capacitance of the coupling structure separated by metal grids is designed. The double-sided LC compensation network is used to increase the voltage between the plates to transmit higher power. On this basis, an experimental platform for wireless power transmission with bilateral LC compensation is designed and built. When the mesh is 4 cm and the transmission distance is 3.25 cm, the transmission power is 24.25 W, the efficiency is 60%, and it has constant current output characteristics. A contrast experiment was done by changing the side length of the mesh, and it was proved that the smaller the mesh of the metal mesh, the lower the transmission efficiency.