For the complicated turbulent flow in the air film of air bearings, there is no analytical method to solve the Reynold equations. With the numerical method that uses the Fluent software's 3D standard turbulent viscosity κ-εmodel, we analyze the performance of the aerostatic plane bearing with 4 ×4 orifice array and obtain its key pa-rameters such as load capacity, mass flux, pressure distribution and velocity distribution of the coupling air film. The simulation results reveal the air film's pressure distribution in the orifice array: the more orifice units produce the stronger pressure coupling, and the larger the pressure value is; the coupling of the orifices in the array can be obtained from the accumulative distribution of the pressure and velocity of the air film. The effectiveness of the sim-ulation results are verified by the physical model test. The exploration results are useful for optimizing the design of air bearings and identifying the analytical model of air film's pressure distribution in an orifice array.