A novel electricity-adjustable frequency selective surface structure comprises a dielectric plate, an upper conducting layer and a lower conducting layer, and the upper conducting layer and the lower conducting layer are arranged on the front face and the back face of the dielectric plate. The upper conducting layer is formed by arranging upper period units periodically, the lower conducting layer is formed by arranging lower period units periodically, each upper period unit is composed of upper-layer parallel metal bands on the upper edge and the lower edge, a large metal square block in the center and small metal square blocks on the left edge and the right edge, and the upper-layer parallel metal bands, the large metal square blocks and the small metal square blocks are not connected . The lower period units are composed of lower-layer parallel metal bands on the left edges and the right edges. Variable capacitance diodes are welded around the large metal square blocks respectively, and the positive poles and the negative poles of the upper variable capacitance diodes and the lower variable capacitance diodes are welded to the large metal square blocks and the upper-layer parallel metal bands respectively. The positive poles and the negative poles of the left variable capacitance diodes and the right variable capacitance diodes are welded to the small metal square blocks and the large metal square blocks respectively. The small metal square blocks and the lower-layer parallel metal bands are connected through conductive via holes penetrating through the dielectric plate. The influence of a bias network layer on the frequency selection transmission characteristic is reduced through the metal structure of the frequency selective surface.