Rotor assembly and motor

The invention discloses a rotor assembly and a motor, and belongs to the technical field of oil cooling motors, the rotor assembly comprises a rotating shaft, an iron core and two pressing rings, the iron core and the two pressing rings sleeve the rotating shaft, the two pressing rings are arranged at the two ends of the iron core in the axial direction respectively, the diameter of each pressing ring is smaller than that of the iron core, and a magnetic steel groove is formed in the iron core; the magnetic steel grooves penetrate through the two axial end faces of the iron core. Wherein the iron core is formed by laminating a plurality of laminations, magnetic steel through holes and oil drainage through holes are formed in the two laminations located on the outermost side of the plurality of laminations, the magnetic steel through holes are correspondingly communicated with the magnetic steel grooves, and the oil drainage through holes comprise first oil drainage holes with the axial projection located outs