The invention discloses a ship lock and riverbed type hydropower house combined structure, relates to the technical field of hydraulic and hydropower engineering, and provides a ship lock and riverbed type hydropower house combined structure capable of reducing the riverbed width to facilitate the arrangement of a flood releasing structure. The ship lock and riverbed type hydropower house combined structure comprises a ship lock and a house mounting room close to each other, wherein the ship lock comprises two ship lock side walls arranged at intervals; the ship lock side walls comprise upper approach channel side walls, head bay side walls and lock chamber side walls arranged in the river flowing direction in sequence; the head bay side walls, one parts of the lock chamber side walls and one dam block of the house mounting room close to the side of the house mounting room are produced to an integral combined structure; and or, the head bay side walls, one parts of the lock chamber side walls, one parts of the approach channel side walls and one dam block of the house mounting room close to the side of the house mounting room are produced to an integral combined structure. Compared with a technical scheme of singly arranging the house mounting room and the ship lock, the ship lock and riverbed type hydropower house combined structure obviously reduces the total riverbed width to facilitate the arrangement of the flood releasing structure and the reduction of the reservoir inundation loss.