Taking the gas bearing with spiral groove and two-way micro groove structure as the research object, the static characteristics of the bearing were simulated and analyzed with Fluent in ANSYS. By changing the width and depth of spiral groove and two-way micro groove, the effects of gas film thickness, spindle speed, eccentricity, air supply pressure and other parameters on the static characteristics of the bearing were studied. The results show that compared with unidirectional micro slot(axial micro-channel and annular micro-channel) structure,the bearing with two-way micro-channel structure has the best bearing capacity and stiffness.Under the same conditions, the greater the eccentricity, the stronger the bearing capacity and the smaller the stiffness. With the increase of spindle speed, the bearing capacity and stiffness are improved significantly.When the depth of the two-way micro-channel increases, the bearing capacity first increases and then decreases,and the stiffness first increases and then remains unchanged.With the increase of the width of the two-way micro-channel, the bearing capacity and stiffness first increase and then decrease.