With the development of wireless power transfer (WPT) technology, the system consisting of a single transmitter and receiver can no longer meet practical demands. In order to enhance the spatial freedom of energy transmission, a WPT system with multiple receivers has been proposed. Considering that each receiver has different sizes, positions, orientations, load characteristics, and power requirements, there is a need for fast and reliable information exchange between the primary and secondary sides. The technology of energy signal sharing channel enables the electrical energy transmission channel and the information transmission channel to be independent in the frequency domain, with minimal impact of information transmission on energy transmission, thus becoming an important means of communication in multi-coil wireless power transfer (MC-WPT) systems. Based on this, this paper analyzes the energy transmission channel and signal transmission channel of a WPT system with multiple receivers, which share an energy signal sharing channel. A notch filter network is designed to mitigate the interference between channels. After establishing the system model, suitable parameters are selected, and a simulation model is built in Simulink. The effectiveness of this approach is verified through simulation.