The mechanism of the influence of vegetation restoration on soil characteristics in the loess hilly landslide area is unclear， in this study we selected the typical landslide area in the loess hilly and gully region of central Gansu in the upper reaches of the Yellow River as the experimental site. Through field sampling and indoor analysis， combined with fractal theory， the differences in soil particle size characteristics and physical and chemical properties under three ecological restoration measures， namely natural restoration， honeysuckle planting， and corn planting， were compared. The results showed that： （1） Under different ecological restoration measures， the composition of soil particles was mainly composed of sand grains （34%~37%）， fine sand grains （27%-28%）. （2） Compared with natural restoration， the pH in the honeysuckle area decreased significantly， and the moisture content in the corn area increased significantly. The contents of soil organic matter， total nitrogen and total phosphorus in artificial restoration were all higher than those in natural restoration. （3） The range of the single fractal dimension was 2.44 to 2.72， specifically corn （2.72）> honeysuckle （2.65）> natural recovery （2.44）， and the recovery of corn leads to better soil quality. Under different ecological restorations， the single fractal dimension of soil showed an increasing trend as the soil texture changes from coarse to fine. The nutrient content and moisture content of soil restored artificially were higher than those restored naturally， that was， artificial restoration measures were more conducive to enhancing the soil's water retention capacity and nutrient fixation capacity. The study shows that in the process of landslide control， appropriately adopting auxiliary measures of artificial restoration can effectively improve soil structure， increase vegetation coverage of the landslide site， and reduce soil erosion.

Ecological restoration measures  /  Soil physicochemical properties  /  Particle size distribution  /  Fractal dimension  /  Landslides