Abstract: At present, water-lubricated rubber bearings have been widely used in ships, hydroturbines, nuclear pumps and other devices, the water will often have mud and sand impurities and other particles mixed into the water-lubricated rubber bearings and the interior of the shaft, these particles with the rotation of the shaft will continue to produce friction with the shaft, so it will scratch the surface of the shaft, affecting the bearing performance of water-lubricated bearings. In order to investigate the effect of scoring on the dynamic behavior of water-lubricated rubber bearings under unbalanced load, impulse load and step load, a hybrid lubrication model of water-lubricated rubber bearings considering shaft scoring, groove structure and sleeve deformation is constructed by associating the transient average flow Reynolds equation, asperity contact model and transient motion equation of shaft. The calculation results showed: water-lubricated shaft in the eccentric load after acceleration, the axis was not gradually stable in a point, but spiral up, and finally converge to an ellipse, scratch would reduce the eccentric load elliptical axis trajectory of the lowest point, scratch depth and scratch width would further reduce the elliptical axis trajectory of the lowest point, so that the shaft and bearing appear high temperature “Brownian motion”-like repeated collision phenomenon, seriously reducing the life of water-lubricated bearings. The friction of water-lubricated rubber bearings fluctuates with the strong fluctuation of the shaft center, and the fluctuation value increased with the increase of scratch depth and scratch width; scratches did not affect the shape of the axis trajectory after the applied pulse load, but would expand the range of motion of the axis, resulting in more solid contact, impact and wear between the bearing and the shaft, reducing the bearing's ability to resist the impact of the pulse load and the life of the bearing; as the pulse load had limited action time, the axis converged to the original equilibrium position when the pulse load disappeared, while the step load made the axis converge to the new equilibrium position and work stably, and the axis movement range would become larger when the shaft had scratches; the presence of scratches could cause solid contact in the bearing system when subjected to impulse loads, resulting in wear of the bearing; large scratch depth and scratch width made the water-lubricated rubber bearing under the step load from the elastomeric lubrication state into the mixed lubrication state, making the bearing performance deterioration, which would aggravate the bearing failure. The presence of scratches degraded the automatic resistance of the bearing system to external load disturbances relative to a non-scratch shaft; of the three types of external load disturbances, the resistance of the scratched shaft-bearing system to eccentric loads is the poorest.