Flood discharge, discharge and diversion integrated hydraulic structure structure and construction method

The invention provides a flood discharge, discharge and diversion integrated hydraulic structure structure which comprises a vertical shaft type flood spilling hole, a diversion hole communicated with the vertical shaft type flood spilling hole is formed in one side of the vertical shaft type flood spilling hole, a water recession tunnel is arranged in the vertical shaft type flood spilling hole, and the two ends of the water recession tunnel are connected with a vertical shaft section and a stilling pool section in the vertical shaft type flood spilling hole respectively. The tunnel body part of the diversion tunnel comprises a connecting section which is connected with the recession tunnel in an intersecting manner, so that the diversion tunnel and the vertical shaft type flood spillway tunnel can share the recession tunnel section which is intersected by the connecting section; and a water discharging pipe is arranged at the bottom of the water recession tunnel, so that the water discharging pipe and the v