Stage 4 rectal cancer refers to the situation that the tumor has developed distant metastasis, at this time, the survival time can only be prolonged as much as possible, which is a more serious situation. Stage 4 rectal cancer has already belonged to advanced stage, the spread of cancer cells is too large, surgical treatment can not completely remove the lesions, and only chemotherapy can control the cancer cells to prolong the survival time as much as possible. Patients can have a light diet, avoid spicy and greasy food, and take proper exercise to enhance their physical fitness in order to effectively fight against the disease. It is suggested that when rectal cancer occurs, treatment should be carried out at an early stage in time, which can effectively avoid the development of the disease and bring difficulties to the treatment.