Abstract: To investigate the effects of typical locations on soil mechanical composition after artificial soil cover treatment, with the aim of providing theoretical and practical basis for vegetation greening and ecological reconstruction in different positions of coal gangue mountains. The soil particle size parameters, fractal dimension and grain size frequency curve of windward slope, top platform and leeward slope were studied in detail by laser particle size meter. The results show that the mechanical composition of the reconstructed soil of coal gangue mountain is mainly sand and silt, and the clay content is 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 locations is excellent, skewness is extremely positive, kurtosis is narrow cusp. The fractal dimension of soil particles is positively correlated with clay and silt content, and negatively correlated with sand content. The lowest fractal dimension is 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 soil particle size frequency curves undergo a sharp increase in slope at 0.1 mm in different positions, with the peak occurring in the range of 0.1-0.25 mm, where the slope of the size frequency curve is the largest. Artificial soil cover treatment is beneficial to the thinning of soil particles and the improvement of soil texture. The windward slope may have the worst restoration effect due to wind erosion, so it is suggested to strengthen the greening of the windward slope.