Direct at the anticorrosive problem of the pipeline, especially inner wall of the small-caliber pipe, we conceived and designed a new anticorrosion glass fiber powder reinforced plastic (GFRP) coating material. The reinforced material is GFRP powder, but not traditional fiber glass cloth or short glass fiber. This material assures perfect physical and chemical properties of traditional GFRP and ensures good coating fluidity for it at the same time. By experiment, raw materials of GFRP coating, their best formula and the fiber glass’s dispersion technology and parameters were determined. Drying time, thickness, abrasion resistance, adhesion, flexibility, heat resistance, and chemical resistance of coating were tested.