The invention relates to the technical field of ships, and provides a channel structure, a ship and a motor hoisting-out method. The problems that area occupied by decks is large, the under-deck channel is complicated in structure, a staff channel is small, construction is inconvenient and cost is high existed in arrangement of bow thrust unit in the prior art are solved. The channel structure comprises a channel limited by wall boards of the ship and a hatch cover platform used for covering the channel, and a through hole for entering and coming out of sailors is formed in one side of the hatch cover platform. The hatch cover platform is detachably connected with the wall boards of the ship through connecting devices. A hoisting device is arranged on the top face of the hatch cover platform. The channel structure, the ship and the motor hoisting-out method have the beneficial effects that the deck space is saved, structure channel design and construction are more simpler, and cost of a shipyard is reduced.