The capacity and stiffness of gas bearings can be improved by reducing the gas film, in order to study the characteristic of aerostatic thrusting gas bearing with slotrestricted in small gap, the FLUENT software is used to simulate the flow field. The flow field of the gas bearing with discontinuous slotrestricted on the small clearance was calculated with the slip boundary conditions. The results show that the impact of slip is gradually reduced along with increasing of the air film thickness, when the film thickness ≥4 μm, the impact of the boundary slip can be neglected. The slit structure influence on bearing static characteristics was calculated. The results show that under the same conditions as other parameters, the capacity of bearings increases with the increasing of the width of slot, and decreases with the increasing of the depth of slot. Under the same conditions as other structure parameters, with deceasing the width of slot, the maximum stiffness increases, gradually decreasing the maximum stiffness corresponding the gas film thickness. With increasing the depth of slot, the maximum stiffness increases, gradually decreasing the maximum stiffness corresponding the gas film thickness.