Epoxy based grouting materials should concern with low viscosity, high strength, rapid curing, and low shrinkage. A polyurethane/epoxy grouting material was prepared. Through formula design, its initial viscosity was reduced to below 200 mPa·s. The morphology observation confirmed its porous and IPN structure. Compared with pure EP, its tensile strength, compressive strength, and impact strength were increased by 87 %, 20 %, and 50 %, respectively, as well as the volume shrinkage was significantly reduced. The inherent strength of PU/epoxy resin grouting materials was significantly higher than that of concrete, even in humid environments, their bond strength was 3.26 MPa. The theoretical grout flow rate and diffusion radius at different stages of the grouting process were also determined, which achieved an excellent on-site grouting effect.