Hyperextension of the knee can be corrected by immobilization in a brace or cast, surgical treatment, postural correction, rehabilitation exercises, and rest. Specific correction methods need to be chosen according to different causes. Common causes include congenital knee dislocation, cerebral palsy, knee ligament injury and so on. 1. Congenital knee dislocation: knee hypoplasia caused by congenital dysplasia of the knee joint. It can be corrected by fixing it with a brace or plaster for about 1 year, and in serious cases, it needs to be corrected by surgical treatment. 2. Cerebral palsy: knee hyperextension due to neurodevelopmental disorder. There is no special correction method. It can be corrected by promoting the recovery of nerve function, as well as correcting posture and rehabilitation exercises. 3. Knee ligament injury: the ligament around the knee joint is injured, resulting in knee hyperextension. For mild injuries, the ligament damage can be minimized through proper rest and the injured ligaments can be repaired, and the knee hyperextension can be corrected on its own. In severe injuries, immobilization in a cast or splint is necessary to promote the recovery of the knee ligaments and then correct the problem. Surgery can also be performed to repair damaged ligaments. There are other causes of hyperextension of the knee, such as trauma, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then follow the doctor’s instructions to give targeted treatment or treatment.