Adjustable-pitch propeller for ocean vessel

The invention relates to the technical field of propeller accessory devices, in particular to an adjustable-pitch propeller for an ocean vessel, which can adjust the pitch of the propeller in the sailing process so as to improve the maneuverability of the vessel, and comprises a hull, a motor and a propeller assembly, the hull is internally provided with a mounting cavity, and the motor is mounted in the mounting cavity; the propeller assembly comprises an outer propeller sleeve, an inner propeller shaft, six sets of blades, an adjusting hydraulic cylinder, two sets of bearings, a spline housing and a gearbox, a rotating hole is formed in the left end of the ship body in a penetrating mode, bearing grooves are formed in the left end and the right end of the rotating hole, the two sets of bearings are installed in the two sets of bearing grooves in a matched mode, and the right end of the outer propeller sleeve is installed with the two sets of bearings in a matched mode. A spline groove is formed in the inner