Spillway

The utility model provides a spillway which comprises a flood discharge groove formed in a dam body, at least one step which is gradually lowered is formed in the groove bottom of the flood dischargegroove in the overflow direction, and each step is covered with at least one flexible energy dissipation piece which is stacked up and down so that energy dissipation of water flow can be achieved. And the flexible energy dissipation pieces on any two adjacent steps are partially overlapped, so that the flexible energy dissipation pieces on the steps are sequentially connected end to end. According to the spillway, due to the fact that the flexible energy dissipation pieces are arranged on the steps, the energy dissipation effect of water flow along the way can be improved, and therefore scouring damage to a downstream river channel caused by spillway flood discharge can be reduced; meanwhile, the spillway can have good deformation coordination capacity, the energy dissipation effect on water flow can be further i