The longest survival time in the middle intermediate stage of rectal cancer cannot be estimated, but the five-year survival rate of patients in this stage is about 50%~65% after active treatment, and the efficacy is usually not assessed by the longest survival period in clinical practice. Rectal cancer is a common malignant tumor, belonging to a kind of colorectal cancer, and the occurrence of the disease is related to a variety of factors, such as poor dietary habits, heredity, and age. The treatment after diagnosis is a comprehensive treatment mainly based on surgical resection. If patients with mid-stage rectal cancer have the opportunity of surgery, surgical resection is feasible, and can be supplemented with radiotherapy, targeted therapy and other therapies after surgery. After post-treatment, the five-year survival of patients is 50%~65%. In addition to staging, patient survival is also related to physical fitness, treatment effect and other factors, the better the physical fitness, the better the treatment effect, the longer the survival period. Patients should follow the doctor’s instructions for regular review after surgery, and maintain good dietary habits, such as drinking more water every day, eating more fresh vegetables, and avoiding excessive consumption of high-fat foods, in order to prolong survival time.