Abstract: In order to improve the efficiency and flexibility of microwave wireless power transfer (WPT), a reconfigurable metasurface based on mechanical control is proposed and implemented. The reflective metasurface is designed based on the Pancharatnam-Berry (P-B) phase principle and the phase control for beam steering is achieved by mechanically rotating the structure in the element. Thus the structure can be used for WPT. Simulations show that the metasurface performances either co-polarization focusing or scattering for right-handed circularly polarized plane wave with vertical incidence. Furthermore, by placing the metasurface in the reflector antenna of the transmitter in the WPT system, EM switch can be realized. Based on these studies, a WPT system is established. The experimental results show that when the transmitting antenna is located at the focal point of the metasurface and at the working frequency around 5.8 GHz, the antenna gain is increased by 2.7 dBi by adjusting the metasurface to focusing state, thus EM switch is achieved.