The chemotherapy cycle for bowel cancer, which often refers to postoperative adjuvant chemotherapy, lasts for a total of six months, and the number of courses varies according to the protocol, with 12 courses for the 2-week protocol and 8 courses for the 3-week protocol. In addition, after bowel cancer surgery, although the tumor lesions are removed, there may be micro-metastases inside the abdominal cavity or lymph node metastases, so chemotherapy is needed to treat the disease, and it is generally recommended to use capecitabine combined with oxaliplatin, and other treatment options are also available. In general, eight courses of treatment are needed, that is, three weeks of treatment, usually two weeks of oral medication, then a week of rest, and then the next cycle of chemotherapy, the total time is about six months, but also according to the patient’s response, if in the late stage of chemotherapy, the patient’s response is heavy, you can also appropriate interval chemotherapy time.