Patients with intestinal obstruction often require indwelling gastric tube for gastrointestinal decompression therapy clinically, and the common reasons are mainly as follows. First, by aspirating the gastric contents through gastrointestinal decompression, it is possible to determine whether the patient is accompanied by gastrointestinal bleeding, cholestasis, or delayed gastric emptying by observing the color, amount, and nature of the gastric contents, thus facilitating the formulation of the next treatment plan. Second, through gastrointestinal decompression, the accumulated food and gastric juice in the stomach can be completely emptied, thus reducing the pressure in the patient’s stomach, improving abdominal pain and bloating, which is conducive to stabilizing vital signs and facilitating faster recovery. Third, emptying the stomach can reduce the continuous secretion of gastric and intestinal fluids to avoid aggravation of intestinal obstruction symptoms. At the same time, drugs can be injected through the gastric tube to promote faster recovery of intestinal peristaltic function and early resumption of exhaustion and defecation in order to achieve better therapeutic effects.