For the micro scale effect of near surface velocity slip on liquid hydrostatic bearing oil film gap flow in two dimension,computational fluid dynamic method was applied to investigate the effects of velocity slip on bearing capacity and stiffness.By adopted definite velocity slip boundary condition into Navier Stokes equation,the Reynolds equation suitable for liquid in two dimensional flow in the micro scale condition was deduced.Numerical simulation results show that bearing capacity and stiffness are largely changed under the effect of velocity slip.With the increase of slip length,the maximum bearing capacity is reduced seriously and stiffness is increased.When considering the slip in oil film flow,the optimal value of oil film thickness is decreased.