The invention belongs to the technical field of environmental geotechnics, and in particular, relates to a composite sealing cover structure of a sulfide-contained mine solid waste landfill field. The composite sealing cover structure of the sulfide-contained mine solid waste landfill field, realizing the purpose of the invention, consists of three composite sealing cover layers formed by three sublayers with different permeability coefficients, different matric suctions and different thicknesses; and a surface layer of the landfill field can keep enough water to realize reduction or elimination of air entering the internal of the landfill field so as to prevent formation of sulfide oxidation acid production conditions in the landfill field. The composite sealing cover structure also has the advantages of simple construction and low cost, and is more suitable for popularization in mining areas.