The invention discloses an all-water-blown high-dispersion silicon dioxide in-situ reinforced polyurethane grouting lifting material and a preparation method thereof. The all-water-blown high-dispersion silicon dioxide in-situ reinforced polyurethane grouting lifting material comprises a component A and a component B, wherein the component A is prepared from hydrophilic polyether polyol, dispersants, silica sol, composite catalysts, foam stabilizers and water; the component B is polyisocyanate. The polyurethane grouting lifting material is higher in storage stability, is used as a a grouting lifting repairing material with higher compression strength, and is applicable to lifting repairing under different geological conditions; when the polyurethane grouting lifting material is applied to lifting repairing of buildings or road foundation collapse, the requirements of construction operation can be met; the rapid lifting repairing effect can be achieved.