Preparation method of economic, environment-friendly and high-water-stability engineering residue soil pavement base course

The invention relates to the technical field of engineering residue soil recycling, and particularly discloses a preparation method of an economic, environment-friendly and high-water-stability engineering residue soil pavement base course. The method comprises the following steps: S1, mixing a curing composition with engineering residue soil, and uniformly stirring; S2, adding water and uniformly stirring; S3, carrying out compaction and maintenance to form a preliminarily-reinforced soil body; and S4, applying a urease-urea mixed solution to the preliminarily reinforced soil body to form the engineering residue soil pavement base layer. The curing composition comprises an inorganic gel material and magnesium oxide. In the invention, based on the principle that low-price materials are used completely and combined with multi-dimensional accurate vacancy filling of advanced novel materials, the engineering residue soil is adopted as a main material of the pavement base layer, and primary curing of an inorganic