Based on a range of experiemts on the MOMS model in terms of various nested scheme,the Davies flow relaxation scheme,able to give satisfactory results and less complicated in operation,is selected with the forecast values of the T42 spectrum used as the mesh boundary values.The improved MOMS version and the original model are run with the same event and their resuIts compared.Evidence suggests that the former is better for it takes into account the forcing of the meso system around the boundary in a large-scale circulation background field,thus improved the practical capability of the limited-area model.