Low efficiency of resource utilization of rural solid wastes resulted in more and more serious environmental pollution in rural areas. As a significant resource approach of rural solid wastes, compost has been widely used. Compost-derived HAs as the important products of solid waste compost were confirmed to be redox recently. Whether compost-derived HAs were similar to natural HAs to be able to promote the reduction of Fe3+ mineral was unclear. The rural solid wastes compost continued 40d in an indoor composting reactor. Physical and chemical indexes changes during composting confirmed the successful rural solid waste compost. Spectra results of compostderived HAs indicated that the aromaticity, humification and content of redox functional groups of compostderived HAs were all increased during composting, which would facilitate the reduction of Fe3+ minerals. Specific UV absorbance values of compost-derived HAs demonstrated that quinones were the main redox functional groups within compost-derived HAs, which were mainly derived from the degradation of lignocellulose in compost materials in middle- and later-stage compost. Then these quinones would combine with the compost-derived HAs which would accelerate the humification of compost-derived HAs, increase their redox properties and the reduction of Fe3+ minerals and facilitate the degradation of organic contaminants in soil.