Knee release surgery usually resolves extension limitations. Clinically, knee release surgery can be used to treat patients with severe knee flexion deformity who do not have an increased anterior arch angle of the femur or tibial rotation. It is also indicated for patients with joint stiffness and limited knee flexion and extension. Knee release surgery involves incision and release of adherent soft tissues, such as subcutaneous muscle tissue, deep fascia, joint capsule, and tendons, under epidural anesthesia. Early postoperative knee flexion and extension exercises are required to prevent recurrence of adhesions or joint stiffness. Generally speaking, conservative release is preferred for treatment of limited knee extension, and surgery is an option when conservative treatment is ineffective. Whether or not to choose knee joint release surgery to solve the problem of restricted extension depends on the patient’s own condition, and it is recommended to consult a doctor in time and choose the appropriate treatment under the guidance of a professional doctor.