FRP I-beam (pultruded I-beam) is made of non-alkali and non-twist glass fiber ply roving, warped and immersed in polyester resin (epoxy resin, phenolic resin) continuous drawing, heating and curing, with high mechanical and dielectric properties. According to different molds can be made of various sizes to meet different needs. Compared with traditional materials such as steel, aluminum and wood, the product properties have the characteristics of insulation, non-thermal conductivity, beautiful and easy maintenance.