The air bag to fix the body is made of high wear-resistant TPU materials, which can effectively reduce the loss of weight and heat of the patients. Its lining is high polymer foam particles and it is equipped with a special pump. After wrapping the fixed air bag in the part of injured body, use a special pump to remove air from the body fixed air bag to make the body and the air bag fit together closely to protect the injured part and avoid second injury. The system won't cause any affection to X-ray, CT or MRI equipment working as it doesn't contain any metal parts.