Meniscus repair techniques mainly include open and arthroscopic meniscus repair techniques, of which open surgery has more disadvantages, such as large trauma, slow recovery, etc., but is currently used less. Meniscus injury is the most common sports injury in knee joint. The traditional treatment for meniscus injury is to remove part or all of the meniscus, which will obviously aggravate the degeneration of the knee joint. Therefore, nowadays, we advocate to keep the meniscus as much as possible to prevent the premature degenerative changes of the knee joint. 1. Open surgery: It is rarely used because of its disadvantages, such as large trauma, easy adhesion, slow recovery and infection. 2. Arthroscopic meniscus repair: the main disadvantages are the relatively high cost and the risk of infection, but it is relatively unlikely.