Premountain alluvial fan salinized land treatment method

The invention discloses a treatment method for a mountain-front alluvial fan salinized land, and belongs to the technical field of soil treatment, and the method comprises the following steps: soil sampling investigation: taking a fixed point as a center in a sampling range, and referring to a laying distance of concealed pipes in a close area to form a 3D * 6D sampling range; soil texture analysis: measuring the particle size of the soil sample, judging the position of the aquitard soil layer with the clay content exceeding 20%, and carrying out treatment analysis by taking the point position coordinate in the radial direction of the mountain as the abscissa, the soil layer depth as the ordinate and the clay content of different aquitard soil layers at different point positions as the basis; identifying the shape of a weak permeable soil layer with the clay particle content of 1.0-2.0 m in the radial direction of the mountain body exceeding 20%; determining soil permeability: taking undisturbed soil by adopt