The natural survival period of rectal cancer is generally 10-20 months, and when it occurs in the submucosa without lymphatic metastasis, the five-year survival period can reach 90%; if there is lymphatic metastasis and the metastasis is in the submucosa, the five-year survival period is about 30%-50% for patients who have undergone surgery. In addition, the survival of rectal cancer patients who have undergone surgery is about 70%-80% through census. Early treatment through professional interventions is recommended to achieve good results and further improve the survival rate.