Conventional lifting slings (synthetic fiber lifting slings) are typically made from high-strength polyester filament, offering multiple advantages such as high strength, wear resistance, oxidation resistance, and UV resistance. Simultaneously, they are soft in texture, non-conductive, and non-corrosive (harmless to the human body), making them widely utilized in various fields. There are many types of lifting slings, and conventional lifting slings (classified by sling appearance) can be categorized into four types: round endless slings, flat endless slings, double eye round slings, and double eye flat slings.