If low rectal cancer is detected early, it can be cured through standardized treatment; if it is locally advanced, it can be prolonged through surgery, radiotherapy and other treatments, and the prognosis is mainly related to its type and the timing of treatment. If low rectal cancer is detected early, surgical resection is still the first choice if surgery can be done. After surgery, according to the clinical stage, pathological type, and whether there are high-risk factors for recurrence, it will be decided whether radiotherapy or chemotherapy is needed after surgery. Through comprehensive treatment, low rectal cancer is still very likely to be cured. If low rectal cancer is found in locally advanced stage, it usually cannot be cured, but the life of patients can be prolonged and the quality of life can be improved through treatment. Its prognosis depends on the situation, which is mainly related to the pathological type of rectal cancer, the timing of treatment and whether metastasis occurs. Low rectal cancer can be treated comprehensively by surgery such as local excision and radical resection, radiation therapy and chemotherapy such as fluorouracil. It is suggested that once diagnosed, low rectal cancer should seek medical treatment in time, and according to the specific condition, under the assessment and guidance of professional doctors, appropriate treatment plan should be formulated to control the disease, improve the quality of survival and prolong the life cycle.