Introduction: Shape memory alloy applied to the fishing series are mainly fishing support, eight-ring link, fish lock, anti-winding string hook, fast sub-clip. The use of ultra-elastic NITI wire to do NITI alloy stent is another application of shape memory alloys. In the past, people always use stainless steel wire, But it is often damaged due to bending problems, now use NITI shape memory alloy, with high resistance to damage, Anti-corrosion, no rust, it can be used repeatedly, and now it has become the main materials of fishing industry .