Abstract: The development of coal mining areas will generate and accumulate a large amount of waste, occupy a large amount of land resources and cause problems such as environmental pollution, land desertification and soil erosion. The use of coal gangue and other wastes to make porous soil for ecological restoration in mining areas not only solves the problem of waste storage of coal gangues but also restores the ecological environment, which is an important research direction for ecological restoration in mining areas. This article examined the characteristics of porous soil prepared by foaming coal gangue, including bulk density, particle size distribution, pH, water retention, loss rate, heat retention, etc., and compared it with natural soil characteristics. Experiments showed that compared with natural soil, the loose density of coal gangue porous soil was reduced by about 36%, the water retention was increased by about 51%, the loss rate was reduced by about 63.1%, and the thermal insulation was better, but the pH was high, suitable for planting alkali-resistant Sexual plants. Further processing was required before they can be used to grow large plants.