Comprehensive arrangement of combining tunnel-type nature-like fishway with fish lock and application method thereof

The invention discloses a comprehensive arrangement of combining a tunnel-type nature-like fishway with a fish lock and an application method thereof. Downstream beds and upstream reservoir water areas are connected through a fishway main body and the fish lock; the fishway main body is arranged in mountains beside powerhouses and comprises side walls, a bottom board and a top arch; a plurality of contraction sections are arranged in the fishway main body to separate the fishway main body into a plurality of fishway pond chambers; and the fish lock is sequentially provided with a fish lock downstream working gate, a movable fish driving device, a stilling basin, a fish lock upstream working gate and a stoplog gate from the downstream side. The comprehensive arrangement disclosed by the invention can be adapted to large and rapid changes of upstream water levels of reservoirs and narrow landforms of beds and has the advantages that fishes are guided to pass according to the different upstream water levels; appropriate water temperature, flow and flow velocity are provided for fish migration; the natural aquatic environments of rivers can be simulated; the excavation volume and the engineering design and the construction difficulties are reduced; and the construction cost is reduced while the fish passing effect is guaranteed at the same time.