Preserved duodenal pancreas head resection was first reported by the German surgeon Beger in 1972. It is mainly indicated for patients with chronic mass pancreatitis and benign tumors of the head of the pancreas. This procedure only removes the diseased head of the pancreas, preserving the normal access to the gastroduodenal and biliary tracts. Previously, due to the close anatomical connection and common blood flow between the head of the pancreas and duodenum, it was very difficult to remove the head of the pancreas alone while preserving the duodenum, and only the more traumatic pancreaticoduodenectomy could be performed, which included the distal stomach, duodenum, proximal part of the small intestine, head of the pancreas, gallbladder and common bile duct, and then the reconstruction had to be performed, and gastrointestinal anastomosis, pancreatic-intestinal anastomosis and biliary-intestinal anastomosis were performed, which is the largest classical operation in abdominal surgery. It is the largest classical surgery in abdominal surgery. In contrast, duodenal resection of the head of the pancreas, which preserves only the head of the pancreas, preserves the duodenum, stomach, small intestine, common bile duct or gallbladder (sometimes combined with resection), and is significantly less invasive. Postoperative recovery and future nutrition are not affected. Intraoperative view: pancreatic head and cystic adenoma being separated: after removal of the cystic adenoma and most of the pancreatic head, the complete duodenum, pancreatic dissection, portal vein and superior mesenteric vein shown After completion of the pancreatic-enteric anastomosis, the preserved duodenum and portal vein, superior mesenteric vein and splenic vein