Abstract:In the study,it lasted four years,chemical composition of percolation water of ground-liter from different vegetation belts,composition and structure of water solvent organic matter were analysed.The result shows that organic nutrients and inorganic nutrient Contents in percolation water from different vegetation belts possess almost the same properties,the main composition of percolation water from different vegetation belts has essencial similar composition and chemical structure.It provides an important basis for protecting and untilizing soil resource in different vegetation belts.