Pervious concrete surface flatness control device

A device for controlling flatness of a pervious concrete surface comprises a plurality of horizontal surface finishing rods and reinforcing steel bar piles, and each horizontal surface finishing rod is supported by a plurality of reinforcing steel bar piles; each reinforcing steel bar pile comprises a U-shaped or arc-shaped pipe supporting ring and a supporting rod, the pipe supporting rings are fixedly arranged at the tops of the supporting rods, and the supporting rods of the reinforcing steel bar piles are fixedly arranged on bottom plate reinforcing steel bars of the tailrace tunnel. Longitudinal horizontal surface finishing rods are evenly arranged in the width direction of the section of the tailrace tunnel, all the horizontal surface finishing rods are arranged in parallel, and the horizontal surface finishing rods and bottom plate steel bars arranged in the longitudinal direction of the tailrace tunnel are arranged in parallel. The horizontal face finishing rod is arranged in the frame pipe supporting