Provided is an electromagnetic wave reflectarray, including a first substrate, a second substrate, first wires and second wires respectively arranged on the first substrate and the second substrate along a first direction and a second direction, antenna electrodes and tuning electrodes respectively arranged into first electrode strings and second electrode strings electrically connected to the first wires and the second wires on the first substrate and the second substrate along the first direction, and a liquid crystal layer disposed between the first substrate and the second substrate. The tuning electrodes completely cover the orthographic projections of the antenna electrodes on the second substrate.