Insertion of nasogastric tube is commonly used in clinical gastrointestinal decompression, enteral nutrition and other important means. Generally, there are the following precautions: 1, the patient takes the lying position, the head is tilted to one side, the gastric tube is connected to the negative pressure device, and the nasogastric tube is coated with sufficient amount of paraffin oil to lubricate the tube. 2, the nasogastric tube slowly enters into the nasogastric tube through the nasal passage of the patient, and the patient is asked to take a deep breath, and when the nasogastric tube reaches the epiglottis, the patient is asked to do a swallowing action or give the patient to drink a small amount of warm water, which is conducive to the nasogastric tube entering into the esophagus smoothly, and avoiding to enter into the trachea. 3, once Once the nasogastric tube passes through the epiglottis, the patient can be instructed to swallow without stopping, the nasogastric tube can be inserted slowly with the patient’s swallowing to enter the 55cm, and the tube can be stopped and fixed with adhesive tape to avoid dislodging, and the negative-pressure pot can be opened to see the gastric fluid flowing out, which indicates that the operation is in place.