With field survey and laboratory experiment, the relationship between the shear strength under different land uses and its influential factors were studied to provide a scientific basis for different land use assessment of regional soil erosion. Five land use patterns, i.e. conifer-broadleaf mixed forests, shrubs lands, gardens, slope farmlands, wastelands were selected as samples to conduct observations upon these values: The soil shear strength index, bulk density, moisture content and dry density, as well as the porosity, MWD of soil aggregate and clay/silt value. Then the influential factors were analyzed with the method of the grey correlation, and the results revealed that the soil cohesion on a same slope gradually decreased from the higher parts to the lower ones under the same land use pattern. Meanwhile, the shear strength, in different lands, changed like this: Sloping farmlands＞gardens＞conifer-broadleaf mixed forests＞wastelands＞shrubs lands. Finally, the soil bulk density had the greatest correlations with the soil cohesion (C) and internal friction angle (φ), while the MWD had smallest correlations with them. To sum up, there were linear relations between the soil shear strength and soil bulk density, total porosity, moisture content and dry density respectively.