All parts on the safety belt shall not be removed arbitrarily. When replacing new parts, select qualified accessories. The service life of the safety belt is 3-5 years. If any abnormality is found, it should be scrapped in advance. In the process of use, it should also be checked and tested once in half a year to one year. It is required that the main components are not damaged. If any damage or deterioration is found, it shall be reported in time and the use shall be stopped to ensure the operation safety.