A high-efficiency reconfigurable metamaterial element for coding holographic antennas, consisting of a complimentary electric LC (CELC) resonator, is proposed in this paper. The low efficiency problem of a traditional reconfigurable CELC element is demonstrated in terms of the power dissipation, before the structure introduction of the proposed element. Simulation showed that the proposed element has a lower ohmic loss when it is switched on, at least 20 times less than that of traditional one, thus increasing the efficiency.