Rectal cancer belongs to malignant tumor of intestinal tract. For patients with impotence caused by rectal cancer surgery, a few of them can be cured, but most of them can improve their condition through medication, physical therapy and surgery. 1. Drug treatment: impotence patients can take type 5 phosphodiesterase inhibitors, such as sildenafil, vardenafil, etc.; androgen drugs, such as testosterone, etc.; vasoactive drugs, such as prostaglandin, phenyltolamine, etc. under doctor’s guidance to improve their condition. 2. Physical therapy: Impotence patients can be treated by vacuum erection device, low energy extracorporeal shock wave therapy and other ways of physical therapy to improve the condition. 3. Surgery: For patients whose condition is more serious or whose effect of conservative treatment is not obvious, vascular surgery and implantation of prosthesis can be used to alleviate the symptoms of impotence. It is recommended that patients strictly follow the doctor’s prescription medication, and actively cooperate with the doctor’s treatment.