The operation is mainly performed for the tumor at the tail of the pancreas. The anatomy of this area is very complex, so the operation is also very complicated, and some people think that this operation should be done in combination with the spleen to be able to clear the surrounding lymph nodes more thoroughly, and also to avoid hemorrhage caused by damage to the spleen and other blood vessels. The surgical steps, different specialists have different opinions and plans, are to free the gastrocolic ligament and splenic colic ligament, pull down the transverse colon and colon, splenic flexure, separate the adhesions between the posterior wall of the stomach and the anterior end of the pancreas, free them completely, then cut the peritoneum with an electric knife at the lower edge of the tail of the pancreatic body, after blunt separation here, carefully identify the anatomical structures of the surrounding large blood vessels, ligate them in turn, then completely reveal the tumor, determine After resection, the lymph nodes around the celiac artery are cleared. The last step is to suture the severed pancreas, because there is a pancreatic duct inside the pancreas, and some specialists will anastomose the main pancreatic duct with the jejunum here.