Numerical analysis of gas bearings of refrigeration centrifugal compressor with R134a was carried out to obtain the internal flow field of the air membrane,and the bearing capacity and flow rate were calculated.The results show that the support force of axial gas bearing is more than 300 N when the unilateral gas film gap is less than 0.05 mm;when the average gas film clearance of radial gas bearing is from 20 μm to 25 μm and the eccentricity is 0.2,the bearing capacity is more than 300 N.The usage of high-pressure refrigerant in the bearing supply system leads to the decrease of refrigeration capacity,the performance coefficient of the refrigeration system is reduced by 1.4%.