Powdery soil stabilizer as well as preparation method and application thereof

The invention discloses a powdery soil stabilizer and a preparation method and application thereof, and belongs to the technical field of soil solidification, the powdery soil stabilizer comprises the following raw materials by mass: 3-5% of a binding material, 5-8% of an active material, 5-6% of an activator, 20-30% of an aluminosilicate material, and the balance of organic matter modified bentonite, and the sum of the mass percentages of the raw materials is 100%; the organic matter modified bentonite is prepared by the following steps: uniformly mixing roasted bentonite, an organic modifier and absolute ethyl alcohol, then adding deionized water, adjusting the pH value to 8-10, and stirring and reacting at room temperature for 6-8 hours, aiming at the hydrophilic characteristic of soil, the curing agent and the soil are mixed in a physical and chemical mode, the free water adsorption capacity of soil particles is improved, meanwhile, the particles are easier to combine, the cured soil is gelled into plates