The main surgical procedure for pyloric obstruction is resection of most of the stomach, and postoperative complications include bleeding, postoperative gastroparesis, anastomotic fistula, stump rupture, and intestinal obstruction. Pyloric obstruction is often secondary to recurrent gastroduodenal ulcers, which form scarred stenosis, leading to pyloric spasm and edema, causing pyloric obstruction. The purpose of surgery is to relieve obstruction and eliminate the cause of the disease, so the first major gastrectomy is performed. Gastric resection is a general anesthesia surgery, which is more traumatic and may cause postoperative bleeding, including bleeding from gastric or duodenal stump, anastomotic bleeding, etc.; postoperative gastroparesis may also occur, causing nausea, vomiting and other symptoms; postoperatively, it may also cause insufficient blood supply to the intestinal wall, which may cause ischemic necrosis of the gastrointestinal wall, rupture of anastomoses, or anastomotic fistulas. Improper treatment of duodenal stump may also occur duodenal stump rupture; postoperative may also be due to the stump of intestinal strangulation, manifested as abdominal pain, vomiting; postoperative may also be complicated by dumping syndrome in the distant future, due to the loss of pyloric control after most of the stomach has been removed, resulting in gastric discharge of gastric contents is too fast due to. Pyloric obstruction surgery can cause a lot of complications, it is recommended to choose professional standardized hospital medical treatment, standardized treatment.