The cycle of radiotherapy for pancreatic cancer patients is about 20~25 days, usually 4~5 times a week. Pancreatic cancer is a malignant tumor occurring in the pancreas, with a relatively high degree of malignancy. Radiotherapy is usually carried out about 4~5 times a week, and 1 treatment cycle is about 20~25 days. In the process of radiotherapy, we should pay attention to the observation of patients’ adverse reactions, observe whether there are adverse reactions in the digestive tract, timely recheck the blood routine, liver function, kidney function, to determine whether there is a decrease in the number of white blood cells, platelet count and transaminase level increase, etc., and assess whether there is bone marrow suppression and liver damage. For patients with pancreatic malignant tumors undergoing radiotherapy, it is recommended that they can consult the oncology department of regular hospitals.