Water-lubricated rubber beatings are one kind of the most appropriate beatings for underwater use.Became of the configuration and special application environment,numerical simulation is difficult with FEM software and relevant report is rarely.The water lubrication is especially interested in cost and convenience.As results of capital cost of water-lubricated rubber beating and time consuming of experiment,the numerical approach with FEM prevail.But owning to the petty gap where lubrication fluid is bounded in,the modeling is very difficult.Three dimensional free modal and stress distribution of the bearing are analyzed in numerical simulating with FEM software.The present work of analyzing model is worthful furthermore the model can get hold of results according to experiments.The modal and harmonic analyzing results can direct material design and improvement of structure.