The time required for rectal cancer surgery needs to be specifically analyzed according to the patient’s physical condition, disease degree, invasion scope and other factors, and usually takes 2~4 hours to complete. Rectal cancer is a malignant tumor originated from mucous membrane epithelium of rectum, with no symptoms in early stage and changes in stool properties and defecation habits in later stage. If it is early rectal cancer, the degree of disease is mild and the patient’s body is better in all aspects, the operation time may be shortened, if it is more serious, the operation time may be relatively longer. Patients need to cooperate with doctor’s treatment plan, according to patients’ own conditions, comprehensive treatment, very early and early rectal cancer treatment effect is better, and advanced stage needs surgery combined with radiotherapy and chemotherapy.