Water conservancy project drainage structure

The invention relates to the technical field of water conservancy project devices, in particular to a water conservancy project drainage structure. The flood discharge groove is formed in a dam body; the outer frame is embedded in the flood discharge groove, a plurality of groups of guide grooves are vertically formed in the inner wall of the outer frame, and a plurality of slots are formed in the bottom of the outer frame; a flashboard is connected in each group of guide grooves in a sliding manner, the bottom end of each flashboard can be embedded into one slot, the multiple flashboards are arranged downwards in a stepped manner in the water outlet direction, and a gap is formed between every two adjacent flashboards and is increased in sequence; the traction mechanism is used for simultaneously lifting the multiple flashboards and comprises a vertical first telescopic device, a hinge arranged on the outer frame and perpendicular to the flashboards and a plurality of supporting rods arranged in parallel, th