MATLAB, an advanced computer language used for scientific calculation, is introduced. It was used to analyze the data on soil moisture in bare land, felled fo restry land and Chinese pineland obtained by the long-term measure. The result showed that the soil moisture in the Chinese pineland was the least at the depth of 40-600cm among the three type of land, which indicated that Chines pine mainly consumed the water in that soil layer.Soil moisture in felled land w as more at the depth of 0-400 cm and less at the depth of 400-600 cm than that in bare land. The topsoil moi sture in the bare land was the least among the three kinds of land.