Abstract: Taking soil samples in the lithoidal hilly area of Western Henan as test materials,a case study on the soil particle fractal features of natural secondary forest,wild grassland,mingled forest,poplar plantings and farmland was conducted.And the relationships between fractal dimension of soil particle distribution and selected soil properties have been discussed.The results show that:(1)There exists an obvious trend that soil particles become small in study areas,which has certain effects of soil and water conservation.(2)The fractal dimensions of soil particles under these five land use types range from 2.510 to 2.629,the average fractal dimension of soil particle of natural secondary forest is highest,followed by farmland,poplar plantings,mingled forest and wild grassland,that is to say, the soil particle fractal dimension can reveal the level of soil erosion of lithoidal hilly area in some extent.(3)There is some relationship between soil particle content and its fractal dimension,and it positively correlates with the contents of clay,the fractal dimensions of the soils have significantly positive correlations with the contents of soil particles in size of 0.002～0.001 mm,namely the higher the contents of clay,the bigger fractal dimension of soil particles.(4)Soil particle fractal dimensions only show significant positive correlations with the content of available K,but with other physicochemical properties they did not show any.

Key words: land use types, soil particles, fractal dimension, lithoidal hilly area