The invention discloses a reinforcing and strengthening processing method of chemical grout, a injected body is slightly divided into a plurality of injected rock surfaces through being layered and segmented, then holes are drilled on the injected rock surfaces, the grout injecting pressure and the grout injecting speed of the grout injection are controlled, and the grout injecting time is sufficient, the surface tension whose initial viscosity is 2.0 m Pa.s-15.0 mPa.s and is less than the surface tension of water is used, the surface tension is not less than 0.050 m N/m at 20 DEG C, and epoxide resin grout materials with 1-16 degrees contact angles and the like are used, thereby epoxide resin slurry uniformly filters into a hole and a minuteness crack of the injected body, the gluing of gelatinization matter is good, the properties of the injected body is integrally improved, the strength of the injected body and the like are greatly improved, the over-high engineering cost is avoided, and the manufacturing cost is saved through controlling the infiltration range.