Abstract: In this paper, the numerical simulation of the sensitivity for the large scale topography actions are made by using of the two dimensional zonal average modle in the Z-σ coordinates. It is found that the seasonal movement of subtropical high ridge is influenced by the large scale topography as well as the solar radiation heating. Such as,by the actions of topography the Northward movement of subtropical high ridge is shifted to an earlier time of season and the high ridge is maintained more long time near topography region. These results are in rather good agreement with the seasonal movement of southern Asia high and the dynamic analysis of topography actions.