[Objective] Soil particle composition and fractal dimension was observed in reclaimed soils in order to provide scientific evidences for restoring and improving ecological function of mined soils in wind-sandy area.[Methods] We compared the soil particle composition and its fractal dimension characteristics under three vegetation types and unreclaimed substrates in Daliuta coal mine based on fractal theory.[Results] ① Soil in this wind-sandy area was predominantly fine sand

with the remainder mainly comprised of medium sand at arbor forest

shrubbery and bare sand

while comprised of very fine sand at grassland sites. The effect of vegetation type on soil fine particles varied with soil layers. The content of clay and silt in 0-30 cm of reclaimed soils was significantly higher than that in bare sandy land. ② Fractal dimension of soil particles was 1.306~2.490

and the average value was as follows:grassland (2.425) > shrubbery (2.300) > arbor forest (1.626) > bare sand land (1.550). Changes in fractal dimension were layer-dependent. There is no significant difference between grassland and shrubbery in all soil layers. However

the fractal dimension of grassland and shrubbery is significant higher than that of arbor forest and bare sand land. ③ Fractal dimension is tightly related to soil particle composition

but not to soil moisture and soil organic matter. We found a significantly positive relationship with the clay and silt content

and a negative relationship with the coarse sand content.[Conclusion] It is a quite difference in soil particle composition and fractal dimension between vegetation types. Grassland and shrubbery land could promote the soil grain refinement which can be adopted to reverse the mined environment.