Aiming at the optimization problem of the transfer power and efficiency of the rail-type dynamic wireless power transfer (Wireless Power Transfer, WPT) system, a dual-excitation unit wireless power transfer (DEU-WPT) method is proposed, which effectively overcomes the problem of the power electronic devices in the power system need to withstand large current and voltage stress. At the same time, the output characteristics under different topologies and dynamic mutual inductance changes are analyzed. This paper analyzes the working principle and equivalent circuit model of the dual inverter transmitting structure system, discusses the influence of parameter changes on the system, and compares it with the traditional wireless power transmission system structure. The optimal design is obtained through simulation and the experiment is set up. The platform verifies the feasibility of the method.