As to the solution method of load capacity of air bearing, Finite Element Method (FEM) or Finite Differential Method (FDM) are used usualy in the academic domain to solve the established compressible Reynolds equation. But the condition of boundary of the compressible Reynolds equation was not easy to find, the solution was very fussy and the amount of work was large. Even the precision of the solution was not high. Therefor, by using Computational Fluid Dynamic (CFD) analysis software FLUENT，the air bearing was modelded and simuylated numerically. The solution process is not only simplified, but also the precision is improved. This method will lessen the period of commercialization of air bearing.