Considered the special climate and terrain conditions,the sustainable development in brown soil zone need the theory of scientific use,the soil oxide under different land use systems of brown soil was studied.The results show: In contrast with the forest land,the three different soil layers of the silkworm land and cultivated land have different combined forms of soil oxides.Among the various oxides,total aluminium in every layer are not clearly different,and free and active oxides have relative strongly changes between different layers.In the 0~20 cm layer,the tendency of free silica and active aluminium,which quantities increases with the higher degree of interference of human activities, is displayed.As it showed that the cultivated processes have promote the degree of weathering.In addition,from the distribution of free silica oxide and amorphous aluminium in the solum,the tendencies of three substances congregate downwards and the regularity makes us understand the human effect under different land uses.At the same time,from this result that amorphous iron enriches in cultivated land we further learn the effect of the weathering and eluviation to solum.Active silica seems not to explain the effect on weathering and eluviation in different land uses,but it can show the degree of silica that surface crop absorbs after cultivating land.After cultivating,active silicon is reduced in surface layer.