Chest strap immobilization for rib fractures can be removed and rested when the pain is not obvious during sleep, and further immobilization is needed to relieve pain for those with more obvious pain. The purpose of immobilizing a rib fracture with a chest belt is to relieve the pain caused by the fracture. After rib fracture, due to the presence of respiratory movement, the thorax will undulate, resulting in mild movement of the fracture end and obvious pain, through the external fixation of the chest belt, can greatly reduce the undulation of the thorax, so as to alleviate the pain caused by the displacement of the fracture end, and for the pain is not obvious, can not be the external fixation of the chest belt. Therefore, during sleep, for the pain is not obvious and does not affect the sleep, can remove the chest belt external fixation, for the pain is more obvious, especially in the removal of the chest belt after the patient can not tolerate, can not sleep, or need to further chest belt fixation.