The invention aims to provide a water inlet/outlet arranging structure of a hydropower station. The water inlet/outlet arranging structure comprises a gate shaft platform, a water inlet/outlet trash holding grid groove, a tower body structure, a portal crane track and a lifting portal crane, wherein the tower body structure at least comprises a first tower body, a second tower body and an edge tower; the rear side of the first tower body and the rear side of the second tower body are adjacent to a shore; the rear side and the right side of the edge tower are separately adjacent to the shore; the top of the first tower body, the top of the second tower body and the top of the edge tower are equipped with tower body traffic bridges which are connected to the shore at the rear side; the first tower body is connected with the second tower body through a portal crane traffic bridge I; the second tower body is connected with the edge tower through a portal crane traffic bridge II; and the edge tower is connected with the side shore through a portal crane traffic bridge II. The water inlet/outlet arranging structure overcomes the defects such as a complex structure, great potential safety hazards, great engineering quantity and great capital investment in the prior art, and has the characteristics of a simple structure, high safety, small engineering quantity and small investment.