Four courses of chemotherapy for pancreatic cancer mostly belongs to postoperative adjuvant chemotherapy, which is used to reduce the probability of recurrence and metastasis after surgery. Chemotherapy is a common treatment for pancreatic cancer, and most patients need 4-8 cycles of chemotherapy, the specific time needs to depend on the condition and treatment, among which 4 courses of chemotherapy for pancreatic cancer mostly belongs to adjuvant chemotherapy, that is, chemotherapy after surgery. The treatment can effectively remove the residual cancer cells in the body to reduce the probability of recurrence and metastasis and improve the treatment effect, but the side effects are relatively big, such as loss of appetite and irritability. During the period of chemotherapy, it is necessary to review all indicators regularly to avoid serious adverse reactions. It is recommended that patients actively cooperate with the doctor’s treatment and maintain a good attitude to prolong the survival period.