Nasogastric tube insertion is an important tool commonly used in clinical practice for gastrointestinal decompression and enteral nutrition. Generally, there are the following precautions: 1. The patient is placed in a flat position with the head to the side, the gastric tube is connected to the negative pressure device, and the nasogastric tube is coated with a sufficient amount of paraffin oil to play the role of lubrication. 2. The nasogastric tube is slowly entered through the patient’s nasal cavity, and the patient is instructed to breathe deeply, and when the nasogastric tube reaches the epiglottis, the patient is instructed to do swallowing action or give the patient a small amount of warm water to facilitate the smooth entry of the nasogastric tube into the esophagus and avoid entering the trachea. 3. After the nasogastric tube passes through the epiglottis, the patient can be instructed to keep swallowing action, with the patient swallowing slowly insert the nasogastric tube into the 55cm can stop giving, tape fixed to avoid dislodgement, open the negative pressure pot to see gastric juice out, indicating that the operation in place.