Abstract: In order to provide theoretical and practical basis for vegetation greening and ecological reconstruction in different positions of coal gangue hill, the influence of typical positions on soil mechanical composition after artificial soil covering treatment was explored. The changes of soil particle size parameters, fractal dimension and grain size frequency curve on the windward slope, top platform and leeward slope were studied in detail by laser particle size analyzer. The results showed that the mechanical composition of the reconstructed soil of coal gangue hill was mainly sand and silt, and the clay content was low. Compared with undisturbed soil, sand content decreased, clay and silt content increased, and the mechanical composition of the top platform soil changed obviously. Soil sorting at different positions was excellent, skewness was extremely positive, kurtosis was narrow cusp. The fractal dimension of soil particles was positively correlated with clay and silt content, and negatively correlated with sand content. The lowest fractal dimension was 2.6777 on the windward slope. The heterogeneity of soil particles on the windward and leeward slopes was less than that on the top platform. The cumulative percentage curve of reconstructed soil particles in different positions became steep at 0.1 mm, the particle size was in the range of 0.1-0.25 mm, and the slope of particle size frequency curve was the largest. Artificial soil covering treatment is beneficial to the refinement of soil particles in coal gangue hill and can improve the soil texture. The windward slope may have the worst restoration effect due to wind erosion, so it is suggested to strengthen the greening worl on the windward slope.