Most of the clinical intestinal obstruction is small intestine obstruction, and the small intestine is located in the middle of the digestive tract, and neither decompression by gastric tube nor decompression by anal cleansing enema can be performed on small intestine. The catheter for intestinal obstruction is relatively long, more than three meters long, and can enter the small intestine. The catheter for intestinal obstruction is inserted into the stomach lumen, and the tip of the catheter has a certain gravitational effect and can slide down with the help of intestinal peristalsis, and the tip will have a subtle bend after touching the intestinal wall, guiding the catheter forward along the intestinal wall so that it can reach the obstructed small intestine area. The intestinal obstruction catheter can continuously attract digestive juices inside the intestinal cavity, and there is a one-way valve inside to prevent the backflow of digestive juices and relieve the symptoms of intestinal obstruction. The catheter for intestinal obstruction is fixed via the nasal cavity, and the catheter itself is soft and easily accepted by patients, so it is now more widely used in clinical treatment of intestinal obstruction.