The lack of effective utilization methods results in the accumulation of a large amount of mining solid waste, causing severe environmental pollution and creating significant safety hazards. To achieve the large-scale collaborative utilization of solid waste from mines, in this paper, the water stabilizing layer of the roadbase is prepared with mine solid waste, equal fly ash and calcium carbide slag as raw materials. The basic structure of the three raw materials and the influence of the amount of mine solid waste added on the properties of the water stabilizing layer are studied, and the appropriate mix ratio of the water stabilizing layer of the roadbase is finally obtained. When the amount of solid waste is 80%, the composite mass ratio of calcium carbide slag and fly ash is 1:4, and the total amount is 20%, the optimum water content of the prepared roadbase water stability layer is 16.8%, the maximum dry density is 1.70 g/cm3, and the 90-day compressive strength is 8.51 MPa.