There are three clinical artificial respiration methods, mouth-to-mouth artificial respiration is the most common, followed by mouth-to-mouth and mouth-to-nose artificial respiration. As for mouth-to-nose artificial respiration, it is usually taken when the patient’s mouth is closed and there is no way to pry it open. Mouth-to-nose artificial respiration is most suitable for children or newborns. Because the mouths of children and newborns are small, artificial respiration may cause a difference in mutual ventilation due to asymmetry in size. Mouth to mouth and nose artificial respiration is more effective, more effective to improve the patient’s oxygenation status, is the most important way of artificial respiration for infants and young children.