Specific preventive measures are recommended as follows: 1. Strengthen the detection of harmful substances factors in the radiation operation environment. Timely maintenance of instruments and equipment with excessive dose exposure. 2, strengthen the personal protection of radiation operators. Such as closed isolation operation, wearing personal protective equipment, personal dosimeter. 3.Strictly control the daily number of general radiation and interventional treatment per person, reduce the daily exposure radiation dose of the operator and avoid radiation reactions. 4, in strict accordance with national regulations and standards, strict pre-service, on-the-job and off-the-job occupational health examination, no pre-service medical examination and training of personnel engaged in radiation work is strictly prohibited. Doctors with occupational contraindications should be promptly transferred from the radiation work, the unit should be properly placed in a timely manner. When leaving the job should be timely occupational health checkup. Personnel with suspected occupational radiation diseases should be timely diagnosis of occupational diseases, in order to protect the physical and mental health of workers and legitimate rights and interests. 5, strengthen the exposure to radiation staff and occupational health managers of occupational health education and training on relevant laws and regulations, so that health care workers engaged in radiation operations to understand and master the occupational hazards of radiation, strengthen self-care awareness and legal awareness of occupational diseases, to avoid occupational diseases.