The knee don’t hold the tendon, clinically known as knee interlocking, is generally considered to be due to meniscus injury or intra-articular free body entrapment. In this case, arthroscopic meniscus suture surgery, arthroscopic meniscoplasty, or arthroscopic free body removal can be performed as follows: 1. Arthroscopic meniscus suture surgery: If the meniscus injury is close to the side of the joint capsule, and the blood supply in this area is good, meniscus suture can be used, and the meniscus has a good chance of healing through the suture. 2. Meniscoplasty surgery: If the meniscus injury is far away from the side of the joint capsule, the blood supply in this area is good, and the meniscus has a good chance of healing. 3: If the meniscus injury is far away from the side of the joint capsule, due to the blood supply in this area is less, or even lack of blood supply, the meniscus is more difficult to self-healing, therefore, often choose meniscoplasty, the meniscus to remove the mechanical compression of the meniscus tissues, which can solve the knee don’t hold the tendon situation.