Cystic fibrosis (CF) is the most common lethal autosomal recessive disease. It is caused by a gene mutation on autosome No. 7 that encodes the cystic fibrosis transmembrane transcription regulator (CFTR) protein. Inherited CF disease causes chronic lung infection and deterioration of lung function, leading to death. The common manifestation of CF is that there is a salty taste in sweat, the metabolism is not vigorous, and there are a variety of fecal problems. CF is mainly considered to be a chronic disease, and respiratory infection is the main cause of its incidence. In 5% to 13% of infants with CF, symptoms such as insufficient nutrition, insufficient blood protein, edema, and anemia may also occur.