The time to remove the gastric tube should be decided according to the condition. Gastric tube after gastrointestinal bleeding, acute pancreatitis, intestinal obstruction, and surgery can be removed after the condition is stabilized, usually 3~7 days; pyloric obstruction caused by inflammation and edema is about 1~2 weeks; organic pyloric obstruction requires surgery to be removed; and in the case of a gastric tube for a patient who is nasogastric feeder, the tube may need to be retained for a long period of time. Gastric tube is an important way to provide and establish enteral nutrition for patients who cannot eat under special circumstances, and it can be used for gastrointestinal decompression in patients with GI obstruction and gastrointestinal insufficiency. The gastric tube can only be removed when the vital signs are normal and all biochemical test indicators return to normal. For patients with gastrointestinal bleeding, acute pancreatitis, etc., the gastric tube can usually be removed in three to seven days, and the pyloric obstruction caused by inflammation and edema lasts about one to two weeks, while the gastric tube of nasal feeding patients may need to be retained for a long time. During the insertion of gastric tube, it is necessary to pay attention to the smoothness of the gastric tube to prevent dislodgement, and the gastric tube should be flushed regularly and the color of gastric fluid should be observed at any time. When the gastric tube becomes uncomfortable, notify the doctor in time and do not remove the tube by yourself.