Different routes, different indications, different absorption effects and different risk of complications. Different paths: the path of nasal feeding catheter entering the stomach is relatively short, as long as it passes through the nasal cavity and esophagus. The path into the small intestine is longer, which requires a catheter to pass through the stomach and enter the small intestine through the pylorus. Indications are different: when patients need short-term nutritional support or direct administration in the stomach, nasal feeding catheter will directly enter the stomach. When patients need long-term nutritional support or need to avoid the destruction of some drugs by high acid environment in the stomach, nasal feeding catheter will choose to enter the small intestine. The absorption effect is different: food needs to be digested by gastric acid and digestive enzymes in the stomach, but in the small intestine, food has been digested into small molecules, which is easier to be absorbed. For some patients who need to absorb nutrients or drugs quickly, nasal feeding catheter will choose to enter the small intestine. The risk of complications is different: although there is a certain risk of complications when the nasal feeding catheter enters the stomach and small intestine, the specific risk varies with individual differences and the indwelling time of the catheter. Long-term indwelling nasal feeding catheter will increase the risk of complications, such as infection, bleeding, digestive tract perforation and so on. Generally speaking, the choice of nasal feeding catheter entering the stomach or small intestine depends on the specific situation of patients and the evaluation of doctors.