Large-diameter hollow hydraulic oscillatory motor

The invention discloses a large-diameter hollow hydraulic oscillatory motor in the technical field of mechanical engineering. The motor comprise a hollow rotor, a motor shell component, two end covers, four sealing pieces and a base, wherein the hollow rotor is arranged inside the motor shell component; the two end covers are fixed on the two sides of the motor shell component respectively; the four sealing pieces are arranged on a matching surface of the two end covers and the motor shell component and on a matching surface of the two end covers and the hollow rotor respectively; and the base is fixedly connected with the motor shell component. By the motor, the non-deformability of a rotating shaft can be enhanced, leakage can be reduced, the abrasion disturbance moment can be reduced, and a hollow diameter can reach more than 550 mm.