The surgery of pancreatic tumor is difficult and complex, and requires standardized operation, from the perspective of surgical technique, to “eliminate” the tumor, not only to remove the tumor lesion, but also to clear the lymph node tissue with the possibility of metastasis, which also makes the pancreatic surgery more time-consuming and requires the professional “patience” and “skill” of doctors. This also makes the pancreatic surgery time consuming and requires professional “patience” and “skill”. Pancreatic surgery is not about “speed” but about “quality” and “long-term survival time” of patients. Pancreatic cancer has a high incidence of lymphatic metastasis. 2,787 cases of lymphatic metastasis in patients undergoing radical pancreatic cancer surgery were monitored in the United States, and 54% of pancreatic cancer patients were found to have lymph node metastasis. The Institute of Pancreatic Oncology of Fudan University found that the lymphatic metastasis rate of resectable pancreatic head cancer was as high as 70.8%. In addition, we applied surgical microscopy to search for lymph nodes in 20 expanded lymph node dissection specimens of T2 stage pancreatic head cancer, and after routine pathological examination, 57 were detected with micro-metastasis technique and the total metastasis rate of lymph nodes was as high as 80%. The reason for the high rate of local recurrence after resection of pancreatic cancer is that, in addition to local residuals caused by improper selection of surgical cases, the main reason is that the peripancreatic tissue and the second station lymph nodes ( including the pancreatic body group, common bile duct group, abdominal trunk group and para-aortic group) were not cleared during the first surgery. It is important to point out that lymph node metastasis is not proportional to the size of the tumor. The second lymph node metastasis is already present when the tumor is less than 2 cm, thus enhancing lymph node contouring is also important for small pancreatic cancer. Due to the neurophilic nature of pancreatic leptomeningeal tumors, cancer cells may metastasize to distant sites through the neurohypophyseal space and form interhypophyseal cancer nests. The lymph nodes around the abdominal aorta should be cleared with emphasis on the triangular area formed by the abdominal aorta, inferior vena cava and left renal vein.