Repair of knee injury includes the following aspects: first, bone repair, knee injury can be accompanied by fractures around the knee, then consider surgical treatment according to the displacement of the fracture, can be fixed with steel plate or screws, Kirschner’s pins, for fracture repair. Second, the repair of knee meniscus injury, knee meniscus injury should be explored under arthroscope, according to the type and degree of meniscus injury, consider the meniscus suture or partial and complete resection. Third, the repair of ligament injury around the knee joint, the ligaments around the knee joint generally include the medial and lateral collateral ligaments, as well as the anterior and posterior cruciate ligaments, patellar ligament, quadriceps tendon, these ligament injuries should be based on the level of the injury and the impact on the mobility and stability of the joint and the choice of repair methods. If the joint is stable and the injury is partial, it can be treated conservatively. If it is a complete rupture, leading to instability of the knee joint, it is necessary to choose the early ligament suture repair, bone rivet suture repair, or ligament reconstruction method for ligament damage repair.