The invention relates to the technical field of ship equipment, and discloses an oil distributor limiting structure, a propeller hydraulic system and a ship. The oil distributor limiting structure comprises an oil distributor arranged on a propeller shaft in a sleeving mode, one end of the propeller shaft is used for being connected with a hull, the oil distributor is movably arranged on the propeller shaft through a first limiting piece and a second limiting piece in the vertical direction, the first limiting piece is provided with a limiting groove, the second limiting piece is provided witha sliding piece arranged in the limiting groove in an inserted mode, the first limiting piece is provided with an adjusting mechanism, and the adjusting mechanism is adjusted so as to adjust the moving spacing between the sliding piece and the limiting groove. The problem of overhigh temperature caused by suppress-clamping of the oil distributor and the shaft is solved, and significant safety andeconomic benefits are achieved.