Percutaneous endoscopic gastrostomy (PEG) is a gastrostomy procedure that involves gastroscopically mediated placement of a gastrostomy tube for enteral nutrition or gastrointestinal decompression without surgical intervention and general anesthesia. It is simple, affordable, safe and fast, and has been widely used in clinical practice abroad. In the United States, more than 200,000 cases of PEG are performed each year, and the American Gastrointestinal Association has made it the preferred method for patients who cannot eat through the mouth but need long-term nutrition. bile replacement therapy; additionally indicated for gastrointestinal decompression secondary to chronic intestinal obstruction due to benign or malignant disease. peg can also be used as a surgical transition method or as a method of long-term gastrointestinal decompression or enteral nutrition for gastrointestinal insufficiency. Specifically, the following diseases: 1, various central nervous system diseases causing swallowing disorders; 2, head and neck tumor during radiotherapy or before and after surgery can not eat through the mouth; 3, trauma or tumor caused by eating difficulties; 4, esophageal perforation, esophageal a tracheal fistula can not eat through the mouth; 5, various myopathies caused by swallowing difficulties and completely can not eat anorexia nervosa. Comparison between PEG and other nutritional methods PEG can effectively do long-term nutritional support compared with intravenous hypernutrition, and is more physiologically appropriate. Compared with surgical open surgery gastrostomy, PEG has the advantages of simplicity, no special equipment and technical requirements, less complications, less trauma, no need for general anesthesia, simple extubation, and fast postoperative recovery. Compared with the usual placement of nasogastric tube, it has the following characteristics: 1. reduces the occurrence of gastroesophageal reflux and esophagitis; 2. reduces the occurrence of aspiration pneumonia; 3. avoids the stimulation of the nasopharynx by the gastric tube, the cicatrization and discomfort caused by the long-term pressure and friction of the nasogastric tube; 4. is easier to manage and tolerate than long-term tube feeders; 5. can maintain the dignity of the patient’s appearance and participate in certain activities; 6. facilitates care and administration of 7, general nasogastric tube is very easy to age and obstruct, requiring weekly replacement, while the gastrostomy tube can be left in place for a long time.