A nonlinear model based on the finite element method is provided to compute the static characteristics of partial porous gas thrust bearing, considering the tangential velocity slip at the bearing-film interface. Good agreement is achieved between theoretical and experimental results on static load capacity, mass flow and static stiffness. The new modified Reynolds equation is proved to be a proper model to investigate the characteristics of externally pressurized partial porous gas thrust bearing. With a change to the feeding parameters of permeability coefficient, height or diameter of partial porous restrictors, the effect of the steady state characteristics, such as mass rate of flow, load capacity and static stiffness are studied, Also the performance comparison among the thrust bearings with orifice restrictors, partial porous restrictors and whole porous restrictors shows that this kind of bearing has promising potential in application.