In clinical practice, patients suffering from joint ankylosis with limited knee flexion and extension activities can be treated by release surgery. Conservative release methods can be preferred for treatment, and local massage with the help of a rehabilitation physician can be used to release the adherent muscle tissues in the joint area. If conservative treatment is ineffective, surgery can be considered. An incision can be made under epidural anesthesia to release the subcutaneous muscle tissue, deep fascia, joint capsule, tendons and other adhesions, and the patient must be instructed to perform early knee flexion and extension exercises to prevent postoperative joint stiffness. In addition, the patient should also be treated with local physiotherapy baking and microwave therapy after the knee release, which can make the treatment more effective.