Generally, the chance of living 20 years in the middle stage of bowel cancer is small, which needs to be decided according to the stage of cancer, pathology type, treatment effect, etc., and cannot be generalized. Bowel cancer usually refers to colorectal cancer, which is a common malignant tumor of digestive tract. Patients in the middle stage of bowel cancer may have symptoms such as change of bowel habit, change of fecal character, abdominal pain, abdominal mass, etc. Lymphatic metastasis may also occur. Usually, comprehensive treatment is needed, with surgery as the main treatment and postoperative adjuvant application of chemotherapy, radiotherapy and other methods to improve the survival period of patients. Generally speaking, for cancer, the five-year survival rate is often calculated clinically. For mid-stage bowel cancer patients with lymph node metastasis without distant metastasis, their five-year survival rate is 50%-78% after comprehensive treatment such as surgery, radiotherapy and chemotherapy. However, living 20 years for mid-stage bowel cancer indicates that the patient has reached the state of cured, which is usually less likely. Patients with bowel cancer can effectively prolong their overall survival time through early detection, diagnosis and treatment.