Knee hyperextension can be recovered, knee hyperextension refers to the knee flexion function is normal, but the knee joint has hyperextension performance, the symptoms of mild can be naturally cured, the symptoms of serious need to be corrected through surgery, the clinical manifestation of lateral observation of the knee joint is convex, the lower limb is convex bow, the lower limb full-length X-ray can measure the hyperextension angle of the knee joint. Treatment can choose brace fixation, mild hyperextension patients can use the brace to assist walking, to avoid the gradual aggravation of hyperextension deformity. Children can be immobilized in a mildly flexed position at night with an orthopedic brace, and at the same time, the flexor muscles should be strengthened to counteract hyperextension. Severe hyperextension of the knee can be treated with surgical procedures, including shortening of soft tissues at the back of the knee joint, orthopedic osteotomies of the upper tibia, and orthopedic osteotomies of the femoral condyles.