The utility model discloses a ship overhauling launching device. Ship entering groove, the ship inlet groove is of a U-shaped groove structure. Horizontal extending plates are arranged on the two sides of the top face of the ship inlet groove. A supporting frame is arranged on the side, close to the ship inlet groove, of the top face of the extension plate. A horizontal supporting plate is arranged at the top of the supporting frame; a lifting motor is arranged on the horizontal supporting plate; a rotating shaft of the lifting motor is connected with the rope winding rod through a coupler; the end, away from the lifting motor, of the rope winding rod is connected with a vertical plate arranged on the horizontal supporting plate through a bearing, a lifting rope is wound around the rope winding rod, one end of the lifting rope is wound around the rope winding rod, the other end of the lifting rope extends into the ship inlet groove, a lifting plate is arranged in the ship inlet groove,and the end, located in the ship inlet groove, of the lifting rope is fixedly connected with the lifting plate. By the adoption of the structure, ships in water can be conveniently overhauled after being lifted, ship launching operation can be conducted, the stability of the ships in the overhauling and launching process is greatly improved, and the safety of the overhauling and launching operation is guaranteed.