Glass fiber reinforced Plastic (FRP) is a composite plastic with glass fiber reinforced unsaturated polyester, epoxy resin and phenolic resin as matrix material. As a kind of composite material, FRP has been widely used in aerospace, railway, decorative building, home furnishings, building materials, sanitary ware and other related industries because of its unique performance advantage. Depending on the fiber used, glass fiber reinforced plastic is divided into glass fiber reinforced composite plastic (GFRP), carbon fiber, reinforced composite plastic (CFRP) and boron fiber reinforced composite plastic. It takes the glass fiber and its product (glass cloth, belt, felt, yarn, etc.) as the enhancement material, takes the synthetic resin as the matrix material. Fiber reinforced composites are made up of reinforced fiber and matrix. Fiber (or whisker) diameter is very small, generally less than 10 microns, is brittle material, easy to damage, fracture and corrosion. The matrix is viscoelastic and elastic, and it is ductile material.