The role of knee fixation brace is mainly as follows: 1. Maintain the corresponding angle of the knee joint for fixation. Some diseases require the knee joint to be fixed at a certain angle, so a knee brace can be used to keep the knee joint fixed at that angle, which is beneficial to the recovery and treatment of the disease. 2. The knee brace can limit the movement of the knee joint, which is beneficial to the treatment of the disease. 3. It can protect the knee joint and prevent the knee joint from being injured again. In some cases of limb disease, there will be corresponding dysfunction, when the activity is easy to cause limb injury, so you can protect the joint through the knee joint fixed support to avoid injury caused by the injury, mainly in the above aspects.