Pultruded glass fiber reinforced plastic grid is a kind of plate with gap, which is made of pultruded "I" and "t" shaped profile as bearing bar, solid tube or bar as connecting rod, through certain assembly process. The roving of untwisted glass fiber and other continuous reinforced material felt and polyester surface on the yarn frame are impregnated with resin, and then through a mold with a certain cross-section shape to make it smooth It is an automatic production process of pultrusion products, which can be produced continuously after curing in the mold.