The characteristics of polymerization process at home and abroad are selected for Nylon 6 chips. Through the combination of practical experience and theoretical knowledge, the shortcomings of Nylon 6 polymerization process at home and abroad are removed, and they are organically and reasonably combined. The two-stage polymerization process of polymerization before pressure and polymerization after decompression is adopted, and the average molecular weight of uniform chip is uniform. Advanced automatic control device and distributed control system (DCS) are adopted for centralized monitoring and control to ensure product quality. The products are mainly used to make tire cord, canvas cord, parachute, insulation material, fishing net wire, safety belt, etc. It has excellent electrical insulation performance, alkali resistance, corrosion resistance and other characteristics.