Steel-aluminum drag chains are generally used in cables, oil pipes, gas pipes, water pipes and air pipes of machine tools and other machinery, and play a traction and protection role for cables, oil pipes, gas pipes, water pipes and air pipes. According to the connecting plate and style, it is divided into several categories, and each category has multiple models! Steel-aluminum tow chain (stainless steel-aluminum tow chain, automatic steel-aluminum tow chain, new steel-aluminum tow chain, semi-closed steel-aluminum tow chain). In this way, the steel-aluminum towing chain develops like light, and the speed is fast, but there are also many problems. The most common ones are the quality, service life and mixed images of the steel-aluminum towing chain in the production process. Coupled with the fierce competition in the market, such as some fierce markets, those enterprises that produce steel-aluminum towing chains from the perspective of quality and application have eliminated the production enterprises that only pay attention to the profits for a while and ignore the product quality. It is precisely because such enterprises are promoting the development of steel-aluminum towing chains, both the appearance and the service life of steel-aluminum towing chains have been greatly improved, but for other countries where steel-aluminum towing chains started late, there is still a certain gap between their own products and those of foreign countries. The main reason is not the essential product of steel-aluminum towing chain, but has a certain relationship with the national conditions at that time. The slogan "Don't want quality but quantity" makes China's steel-aluminum towing chain products lag behind other countries.