In order to explore the differences in physiochemical properties of soil of different land resource utilization modes in Chaohai,Weining in Guizhou Province,the soils in different soil layers(0-20 cm,20-40 cm,40-60 cm) under six different land use types(grassland,farmland,Camellia sinensis shrub,Cunninghamia lanceolata forest,Populus yunnanensis forest and conifer-broadleaf forest) were chosen as the research objects.The effects of different land use types on soil quality were studied by measuring and analyzing physical structure and nutrient content of soil.The results showed that:1) The total nutrient and organic carbon contents of soil in Caohai watershed were at a medium-low level in China,the available nutrient contents were low in nitrogen,high in phosphorus,and medium in potassium,the soil nutrient contents were unbalanced and mainly limited by nitrogen.2) The structure and nutrient content of soil were different due to different land use patterns.The average soil bulk density of the grassland was the largest and the conifer-broadleaf forest was the smallest.The porosity of Populus yunnanensis forest was the largest and that of grassland and farmland was the smallest.The total nutrient content of Camellia sinensis shrub was higher than that of other sites soil,the soil organic carbon,available phosphorus and available potassium content of conifer and broadleaf mixed forest was the highest,the content of alkali-hydrolysable nitrogen in grassland was the highest.3) The organic carbon content of soil was related to the physical structure and the content of nitrogen,phosphorus and potassium soil on the basis of Pearson coefficients analysis,indicating that the addition of organic matter is conducive to improving soil physical and chemical properties.4) From the perspective of soil quality recovery,the arbor and shrub stands are beneficial to improve soil quality.