When a child goes to the hospital with an illness, the doctor will often have the child undergo a radiological examination according to the needs of the condition. Although the radiation dose of radiological examination is generally very low and within the safety range, it is still more or less radiation. Parents must consider how to reduce the risk of radiation exposure to their children while receiving reasonable radiological examinations. In order to minimize the harm of radiation, parents should pay attention to the following points: First, reduce the radiation dose, because the size of the harm is related to the radiation dose. First, choose a reasonable radiation examination with relatively low radiation dose. Digital imaging (DR) can significantly reduce the radiation dose and clearer images than conventional X-ray machines. Some surveys show that most parents are not aware that the radiation dose from a single fluoroscopy is more than 10 times greater than that from a single photograph. Therefore, parents are advised to remember this principle: try not to use CT examinations if you can use MRI examinations, and never use fluoroscopy if you can use photographs to solve the problem. Second, choose a professional pediatric radiologist. They can choose the exposure parameters well and do a good radiological examination; they can make a better diagnostic report, which can greatly reduce the chance of re-photography and follow-up review. Again, cooperate with the radiology staff and prepare well for the examination to reduce re-illumination. Try to remove clothing and accessories, especially metal items, reinforced plastics, and herbal plasters and cloths. Children’s clothing is often fancy, and these fancy things often produce a variety of artifacts that are an important cause of rephotography. And with the staff in good position, hold and fix the young child, can not be fixed children should choose to be examined in a sleep state or under sedation. Some investigations have found that the main causes of rephotography after digital imaging applications are malpositioning, motion artifacts, and extracorporeal foreign body artifacts caused by the child’s lack of cooperation. Again, do not crowd the examination room and leave and move away from the examination room promptly after the examination. Waiting for the examination to watch over their children do not move the instrumentation, such as accidentally touch the exposure button, their own exposure to their own X-ray is not very wrong. Second, to protect sensitive parts, radiation hazards associated with the sensitivity of the site. Radiation examination parents can take the initiative to request non-inspection parts with lead skin or lead skirt cover protection, especially important sensitive parts: gonads, thyroid and eye lens for protection. If there are many non-examined parts, direct irradiation should be avoided, for example, when shining the chest, the neck and eyes should be covered, boys should cover the scrotum to protect the testicles, and girls should cover the lower abdomen to protect the ovaries. Third, pay attention to diet: some studies have shown that adjusting the diet and strengthening nutrition has a role in reducing the impact of radiation on children after radiation examination. If appropriate, eat more vegetables such as carrots, kelp, bean sprouts, mushrooms and tomatoes, lean meat, animal liver and other high-protein foods, eat more apples, grapes and other fruits, and drink more water or more green tea.