Polyamides, commonly known as nylon, are polymers containing amide groups in the main chain repeat units of macromolecules. PA has good comprehensive properties, including mechanical properties, heat resistance, abrasion resistance, chemical resistance and self-lubrication, low friction coefficient, certain flame retardancy and easy processing, it is suitable to be filled and modified with glass fiber and other fillers to improve performance and extend application range. The modified PA material has good balance of rigidity and toughness, excellent long-term thermal aging property, antifreeze resistance, chemical property, high temperature resistance, good UV resistance and good processing property, it can be widely used in automobile products such as water tank, intake manifold cover plate, fan blade, rim cover, engine cover cover, etc.