Meniscal injuries are one of the most common sports injuries. It is treated by partial meniscectomy, total meniscectomy, meniscal suture, meniscal thermal contracture and meniscal transplantation. Among them, partial meniscectomy is the most widely used. Total meniscectomy is only used in cases of severe meniscal injury. In young patients, elective meniscal transplantation is recommended after total meniscectomy. However, meniscal transplantation is still in its infancy in China and abroad, and there is a lack of evaluation of long-term efficacy. Meniscal thermal contracture is only applied to some highly active menisci, and similarly, there is a lack of sufficient information on its mechanism of action and evaluation of long-term efficacy. In contrast, meniscal suturing is the treatment with the most certain long-term efficacy of all surgical modalities, and its application has been clinically proven for decades. Mechanistically, meniscal suture is also the least damaging and most consistent with the normal biomechanics of the body. However, the indications for meniscus suturing are narrow. Only simple longitudinal tears of the outer 1/3 of the meniscus can heal after suturing. Such tears are most often seen in acute traumatic meniscal tears and in meniscal tears secondary to partial ACL injuries. It is often seen in clinical practice that many patients have delayed treatment, causing further damage to meniscus tears that could have been sutured and only partially or even completely excised. Therefore, after a meniscal tear is identified, early surgery should be performed to obtain a meniscal suture to reduce postoperative degenerative wear and tear of the knee. Meniscal suturing was first performed only openly after incision of the joint. With the development of arthroscopic techniques and equipment, the vast majority of meniscal sutures can be completed arthroscopically. Arthroscopic meniscal suturing techniques can be divided into 3 types: 1) Outside-in suturing: mostly used for suturing the anterior and anterior angles of the meniscal body; 2) Inside-out suturing: mostly used for suturing the posterior part of the meniscal body, this suturing technique requires an auxiliary incision on the skin, which increases the trauma and has been gradually replaced by full inside-out suturing; 3) Full inside-out suturing: mostly used for suturing the posterior part of the meniscal body and posterior angles of the meniscus. 3) Full internal suture: Mostly used for posterior meniscus body and posterior meniscus angle. It often requires special instruments such as meniscal disposable anchors and meniscal disposable sutures, which are simple and quick to operate, but more expensive. A period of rehabilitation is required after meniscus suturing. Generally, no weight bearing is required for 6 weeks to ensure that the torn portion can heal completely. During this period, regular follow-up visits to the hospital and guidance from the rehabilitation physician are also required to prevent joint adhesions and muscle atrophy. In the Department of Sports Medicine and Arthroscopy at Huashan Hospital, there is a specialized rehabilitation physician who is responsible for the post-operative rehabilitation of surgical patients, which largely improves the efficacy of the surgery. Meniscus suture is highly effective, and patient satisfaction can reach over 95% when the indications and correct surgical operation are mastered. Possible complications of meniscal suture include neurovascular damage during surgery and re-tearing of the meniscus after surgery. The most common is the postoperative sensation of pulling in the joint, which is caused by the pulling of the joint capsule after the suture, and is the main reason why patients are not satisfied with the surgery. Generally speaking, this sensation can gradually improve and disappear gradually within six months.