Among engineering plastic fields, application of nylon 6/66 field is mature. Such products can form coupling with polymers through surface treatment, which can strengthen plastics’ mechanical property, enhance hydrophobicity and ageing-resistant performance of engineering plastics, and improve processing performance, particularly in enhancing stability in products’ dimension, decreasing deformation, and reducing products’ precision. What’s more, products’ color purity and glossiness. As for engineering plastics, high-quality additives are essential.