In order to solve the problem of distributed dynamic characteristic parameter identification of water-lubricated bearings with large length-diameter ratio under partial load,the two-point distributed dynamic model of water-lubricated bearings was established,and the identification method of distributed dynamic characteristic parameters of water-lubricated bearings was proposed.Through simulation test,the accuracy of distributed dynamic characteristic parameter identification of bearings was analyzed by introducing load and displacement signal disturbance,and the distributed dynamic characteristic test of water-lubricated bearings with eccentric load was carried out.The results show that as the excitation force amplitude disturbance increases,the identification error of stiffness and damping coefficients increases linearly.The excitation force phase disturbance has a small impact on the stiffness coefficient,but a significant impact on the damping coefficient.As the displacement amplitude disturbance increases,the identification error of stiffness and damping coefficients increases.The phase disturbance of the displacement signal has a smaller impact on the stiffness coefficient,but a greater impact on the damping coefficient.If the identification error of stiffness and damping is required to be less than 10%,the disturbance amplitude of dynamic load and displacement signal should be less than 10%.If the identification error of stiffness and damping is required to less than 20%,the disturbance phase disturbance deviation of these two signals should be less than 1°.