The definition of carpal instability is generally understood as a group of wrist injuries that produce early or late loss of normal alignment of the carpal bones, the term carpal instability was first used and describes carpal instability associated with navicular fractures, SLIL injuries. The navicular and lunar bones play an important role in transmitting forces and maintaining wrist stability. Physiologically, the navicular bone is palmarly flexed and the lunar bone is dorsally extended, and the stability between the two is maintained by the navicular ligament within the wrist joint. SLIL is divided into navicular lunar palmar ligament and navicular lunar dorsal ligament, SL-d is shorter, thicker and has the greatest fracture strength, it plays the most important role in preventing the separation of navicular and lunar, and is an important structure to maintain the normal anatomical relationship between adjacent carpal bones. Therefore, we believe that in the clinical treatment of navicular and lunar separation, priority should be given to repairing and reconstructing SL-d. SL-v is longer, thinner, and has the greatest fracture deformation, suggesting that it is less strong but more elastic, and this characteristic is important for maintaining the rotational stability of the navicular-lunar joint. The main difficulty is that the navicular ligament exists between the navicular bone and the lunar bone, and it is a ligament with a thickness of only about 3 mm, and we found that the SLIL was torn from the navicular bone or the lunar bone in 6 patients during surgery. However, the disadvantage of ligament reconstruction surgery is that the surgery is more traumatic and requires drilling holes in the navicular bone and lunar bone to penetrate the transplanted tendon, so it is difficult to achieve anatomical reset of the navicular bone and lunar bone and the result is not good; the navicular bone and lunar bone are small in shape and have little contact area, so it is difficult to operate the local fusion of the navicular bone and lunar bone. The postoperative fusion rate is not high. The bone anchor is similar in structure to the anchor of a ship, and there are sutures attached to the anchor tail. The advantages of bone anchor in the clinical treatment of avulsion injury of finger tendon at the point of bony attachment are simple method, small trauma, stable and reliable effect. In recent years, foreign scholars have tried to repair the injured wrist ligament with bone anchors and obtained satisfactory results. After years of development, wrist arthroscopy has become the first choice for the diagnosis and treatment of wrist instability and is considered the “gold standard” for the diagnosis of wrist ligament injuries, superior to MRI and CT examinations. With the assistance of wrist arthroscopy, after identifying the injury site, a small incision is made and the SLIL is repaired using Mitek bone anchors, which is minimally invasive compared with traditional ligament reconstruction surgery and has the advantage of easy anatomical repositioning of the navicular bone and lunar bone, providing important implications for clinical treatment.