In terms of material substitution, long fiberglass reinforced polypropylene products can simultaneously reduce weight and cost. In the past, short fiberglass reinforced materials replaced metal materials. In recent years, with the application and development of lightweight materials, long fiberglass reinforced polypropylene materials have gradually replaced short fiberglass reinforced plastics in more and more automotive parts, which has been further promoted. The research and application of LGFPP materials in automobiles.