Mass fractal dimension of soil particles is one of the inherent properties of soil.However,some assumptions,such as uniform density,have been questioned in calculating soil mass fractal dimension.Additionally,traditional methods to obtain particle-size distribution(PSD) are laborious.For this reason,the concept of the volume fractal dimension of soil part icles is developed and a formula to calculate soil volume fractal dimension is introduced in this paper.Based on the conception of volume fractal dimension and the analysis of 178 soil samples from different land uses,some conclusions could be drawn as follows:the volume fractal dimension of soil particles was significant correlated with the volume percentage of soil clay contents;in soil profile of vegetable and tea land,both the volume fractal dimension and the volume percentage increased with the soil depth;and in soil profile of cropland,both showed the same tendency of increasing with the soil depth,but not monotonously.Soil management had some influence on volume percentage of soil clay and volume fractal dimension.For example,both of them decreased with the rising years of cultivation