I. Regular follow-up is needed to prevent recurrence of rectal cancer Usually, the recurrence rate of colorectal cancer is the highest in the first two years, so patients need to be reviewed once every three to six months, and such frequency should be insisted for at least two years. After two years, the frequency can be changed to once every six months, and then persist for another three years. If there is no recurrence after five years, we can consider that colorectal cancer has reached clinical cure. First of all, we should try to eat less high-fat and high-protein food, because these foods will increase the concentration of bile acids with cancer-promoting effect, especially secondary bile acids in the intestinal cavity, and if a large amount of protein is consumed at the same time, it will produce carcinogenic amino acid degradation products by decomposition in the intestinal bacteria, which can increase the risk of colorectal cancer by large intake of meat and cooking oil. In addition, it is better to eat less fried and barbecued food. Taking ginsenoside Rh2 after surgery can prevent the recurrence of rectal cancer Ginsenoside Rh2 is the anti-cancer active ingredient in ginseng, which can reduce the side effects of treatment, improve the immunity of patients, improve the quality of life and prolong the life of patients when combined with this drug. Fourth, pay attention to patients’ psychological care and keep their mood relaxed Diet should be rich and varied, based on the principle of light and nutritious, with meat porridge, fish porridge, egg porridge, coix rice porridge, lily porridge, wolfberry and other kinds of porridge and soup, together with fruits and fresh vegetables to eat.