The invention discloses a novel intelligent rockfall barrier device for high and steep slope rolling stones. The novel intelligent rockfall barrier device comprises a primary rockfall barrier device and a secondary rockfall barrier device, wherein the primary rockfall barrier device comprises a dual-layer rigid frame; a horizontal fixed pillar and a vertical fixed pillar which are crossed are arranged in the dual-layer rigid frame; a plurality of middle pillars are parallel to the vertical fixed pillar; a plurality of rolling guide cylinders sleeve each middle pillar; the second rockfall barrier device comprises a high-strength underframe, and a steel strand rockfall net is arranged in the high-strength underframe; and the bottoms of the high-strength underframe and the dual-layer rigid frame are connected through a base, and the side surfaces of the high-strength underframe and the dual-layer rigid frame are connected through a high-strength steel frame.