Gastric tube to beat the flow of food 3 to 6 times a day, the specific number of times should be adjusted according to the specific conditions of the patient. Gastric tube is a way of enteral nutrition, which is a nutritional support way to provide nutrients and other nutrients needed for metabolism through the gastrointestinal tract, and it is determined by the length of time, mental state and gastrointestinal tract function. The routes are oral and transcatheter, where transcatheter input includes nasogastric tube, nasoduodenal tube, nasojejunal tube and gastrojejunostomy tube. Gastric tube is suitable for swallowing and chewing difficulties, consciousness disorder or coma, digestive tract fistula, short bowel syndrome, intestinal inflammatory diseases, acute pancreatitis, high metabolic state, chronic wasting disease, correction and prevention of malnutrition before and after surgery, etc.; paralytic and mechanical intestinal obstruction, gastrointestinal tract active bleeding, patients with shock are prohibited; severe diarrhea, intractable vomiting patients should be used with caution. Gastric tube to beat the flow of food should follow the doctor’s instructions, under the guidance of the doctor for targeted treatment.