The equivalent stiffness matrix of bumptype foil bearings was calculated by using the linkspring model,the deflection of top foil was calculated by using finite element method,and the deflections of bumptype foil and topfoil,the thickness of air film and the pressure distribution of bumptype foil bearings were obtained by resolving Reynolds equation with iteration which stops by the convergence of the air film thickness.The relationship between equivalent stiffness of bumptype foil and the other parameters,and the relationship between bearing loads and rotate speeds,environment pressures and average thickness of air film were studied by an example.The results show that the load capacity of bearing is increased with the increasing of the bearing speed,and the increasing rate is decreased gradually.The bearing capacity of bearing is also increased with the internal pressure of the bearing.The smaller the average film thickness,the greater the bearing capacity becomes.