The duration of chemotherapy for pancreatic cancer is affected by the purpose of chemotherapy, chemotherapy regimen, and patients’ physical condition, and it is not fixed, for example, postoperative adjuvant chemotherapy is usually maintained for six months, repeated every 2 weeks or every 3 weeks, and the specific time of medication for each cycle may be in the first one or two days, or in the first 14 days; induction chemotherapy may be two or three months; palliative chemotherapy varies from person to person. 1. Different purposes of chemotherapy: chemotherapy for pancreatic cancer includes preoperative induction chemotherapy to lower the stage, postoperative adjuvant chemotherapy to prevent recurrence, palliative chemotherapy to control the disease as far as possible, etc. Induction chemotherapy may be done for two to three months, postoperative adjuvant chemotherapy generally maintains for about half a year, and palliative chemotherapy varies from person to person and has no fixed regulations. 2. Different chemotherapy programs: different chemotherapy programs have different dosage time and dosage cycle, for example, oxaliplatin + irinotecan + calcium folinate + fluorouracil program for the first two days of dosage, repeated every 2 weeks, capecitabine single drug program for the first 14 days of dosage, repeated every 3 weeks. 3. Different physical conditions of patients: different physical conditions of patients and different tolerance to drugs will also affect the time of chemotherapy, for example, some patients with better physical condition may have chemotherapy for more than ten months, but some patients with bad physical condition may only have chemotherapy for one or two months. Therefore, the duration of chemotherapy for pancreatic cancer should be based on the specific situation and cannot be generalized, and it is suggested that patients should standardize the treatment under the guidance of doctors.