Abstract: To improve the static performance of the static pressure gas bearing and explore its change rule, a porous integrated throttle static pressure gas bearing with pressure equalizing groove is studied in this paper. A mathematical model was established by deducing the gas lubrication governing equation, and the discretized governing equation was solved and calculated by programming software. The effects of different orifice number, gas supply pressure, width and depth of equalizing groove on the static performance of the static pressure gas bearing were analyzed. The results show that the bearing capacity and stiffness of the gas bearing with pressure equalizing groove are improved compared with the porous integrated throttle gas bearing without pressure equalizing groove. At the same time, the number of throttling holes has a significant effect on the bearing capacity of the porous integrated throttling gas bearing with pressure equalizing groove. Still, the bearing capacity growth rate slows when the number of holes increases to a certain extent. The width of the equalizing groove has little effect on its bearing capacity. The depth of the equalizing groove and the gas supply pressure influence the static performance of the static-pressure gas bearing.