In aerostatic journal bearing,load capacity and bearing stiffness can be improved through asymmetric air supply.In order to explore the influence of asymmetric air supply conditions on pressure distribution and static characteristics of aerostatic bearings,the double row air supply aerostatic journal bearing was taken as the research object,and the static characteristics of the bearing under different air supply types (variable pressure air supply hole position and area) and air supply pressure were studied by numerical calculation.The numerical results indicate that the position of variable air supply pressure has a great influence on the static characteristics of the journal bearing.When increasing the air supply pressure in the main bearing area,the aerodynamic and aerostatic effect of the bearing can be significantly enhanced.The bearing load capacity can be elevated with increasing variable pressure area,but the pressurized gas consumption is also increased correspondingly.The bearing capacity can be improved effectively by either increasing the air supply pressure on the loading side or reducing the gas supply pressure on the counter-loading side.The latter method can also reduce the total mass flow rate of pressurized gas.The greater air supply pressure difference between the loading side and the counter-loading side is more conducive to the improvement of bearing capacity.