There are many kinds of FRP pultrusion profiles, including FRP round tubes, FRP square tubes, FRP rectangular tubes, FRP round rods, and FRP I-beams. The basic components of pultruded FRP profiles are resin and glass fiber (including cloth, felt, etc.). It uses fiber (including glass fiber, carbon fiber, organic fiber and other metal and non-metallic fibers) as reinforcement materials, and resin (mainly epoxy resin, polyester resin, phenolic resin) as binder, It is compounded with other auxiliary materials (main auxiliary materials: release agent, curing agent, catalyst, sealing agent, UV light stabilizer, mold cleaning water, gel coat, etc.). It has a series of excellent characteristics such as high temperature resistance, corrosion resistance, high strength, small specific gravity, low moisture absorption, small extension and good insulation