The invention discloses a double-component grouting method applied to designing of soft foundation and slope reinforcement. The double-component grouting method comprises the steps of: determining a hole position; preparing a drilling machine in place; drilling to form a hole; drawing back a drill rod; proportioning the grout liquid; carrying out grouting and the like. The double-component grouting method disclosed by the invention realizes good permeability, especially realizes good permeability to micro sand layers, also realizes quite high solidification performance when flowing water exists in a foundation layer and achieves a water stop effect because the grout liquid is hard to dissolve; the grout liquid strength, the hardening time and the permeability can be regulated according toactual needs of the site; the grout liquid is not lost and is prevented from shrinkage after being solidified; a hardening agent is nontoxic; and pollution to underground water is prevented.