Abstract: With some improvements,the model of Interior Boundary Layer in heating power of Sea wind.Can simulate not only the field of sea wind,but also the flow field of river valley.The numerical computational results are consistent with the values of observation.This paper also brings the discussion on practical application of the preconditional Conjugate Gradient Method (PCG) that is most frequantly used in Multi-level Methods to solve the linear algebra equations,which result from the numerical approximation of Interior Boundary Layer in heating power of sea wind.The Computational time has been shown reduced considenablely.