Largesized turbine power steering bearings are larger in size and higher in pressure than conventional steam turbines and other commonly used smallersized dynamic pressure bearings,the classical lubrication theory based on the Reynolds equation is difficult to meet the computational requirements,and further studies are needed when estimating its characteristic parameters.The finite volume method was used to analyze the static characteristics of a typical nuclear dynamic pressure bearing under different rotational speeds by considering the temperatureviscosity effect of oil and the cavitation effect of oil film.The numerical results of different flow models and different cavitation models were compared and compared with the literature results.The result shows that the realizable kepsilon model combined with the Singhal et al.cavitation model is suitable for the simulation of the dynamic pressure bearing.The static characteristics,such as oil film thickness,pressure distribution,temperature distribution and oil flow rate,and the dynamic characteristics,such as stiffness and damping of largesized turbine power steering bearings at different rotational speeds were obtained.