With the development of large-scale ships, ship collisions with bridges and ports have become one of the main threats to navigation safety.However, the existing protective facilities mainly rely on passive protection and lack intelligence.In order to reduce the risk of ship-bridge and ship-port collisions, with the core concept of “active warning, active protection, and active decision-making”, a flexible barrier active ship interception system suitable for underwater structures such as bridges and ports is proposed by integrating key technologies such as ship navigation anomaly recognition, magnetic detection, and flexible airbag interception.The system composition, system functions, key technical characteristics, promotion, and benefits are elaborated.After analysis, the system can be used as an effective intelligent anti ship collision measure, with the characteristics of convenient and environmentally friendly construction, minimal landscape impact, strong environmental adaptability, intelligent control, durable use, and low cost.It can provide a basic theoretical basis and technical reference for the safety design of key bridges, key ports, and the risk control of waterway navigation safety.