Rectal cancer is treated by radical resection surgery, laparoscopic surgery and targeted drugs. If rectal cancer has been diagnosed in hospital examination, first determine the size of tumor and the depth of invasion, whether there is lymph node metastasis, listen to the arrangement of doctors, and consider surgery for treatment if necessary. Patients with rectal cancer can choose radical resection surgery when they are diagnosed in the early stage, and choose different surgical plans mainly according to the detailed location of tumor, and choose to preserve anal surgery for tumors larger than 6cm in the anal area. With the aggravation of the disease, rectal cancer reaches the middle stage and can also be treated surgically in the treatment, but compared with the early stage of rectal cancer, the survival rate of 5 years after surgery may only be about 50%. For patients with larger tumors, laparoscopic surgery can be chosen in the treatment, and the anastomosis should be handled exactly in the surgery, which can prevent the occurrence of anastomotic fistula after surgery. When rectal cancer is in advanced stage, if combined with intestinal obstruction, fistula surgery is needed for surgical treatment. Patients with combined bone metastasis can be treated by internal fixation and particle implantation, and combined with liver and lung metastasis are treated with targeted therapy on the basis of radical surgery for rectal cancer.