Patients with colorectal cancer should be given a diet that is easy to digest and absorb. Patients with colon and rectal cancer have recurrent, migratory diarrhea and abdominal discomfort, so they should be given a diet that is easy to digest. Take a light diet. Patients mostly have symptoms such as loss of appetite, nausea and even vomiting, so it is appropriate to take light diet and avoid greasy. Avoid eating chili pepper. Chili pepper is very irritating to the intestinal tract and anal region, and has a great stimulating effect on cancer. Some people who like to eat spicy food should slowly reduce the spicy taste in their diet even if they cannot quit spicy diet immediately, and eventually avoid using chili pepper. At the same time, pepper, coffee, wine, high fat and food containing much crude fiber should also be avoided. Anti-cancer herbal medicines have a two-way regulation function, on the one hand, they have the function of supporting and cultivating the root to fight cancer, on the other hand, they have a strong function of detoxifying and removing blood stasis, softening and dispersing knots and killing cancer cells. While it is important to kill tumor cells directly, it is also a tendency to attach importance to quality of life, and TCM has a unique role in this regard. After the patient’s surgery and radiotherapy, actively cooperating with Chinese medicine treatment, which greatly reduces the rate of tumor recurrence and metastasis and mortality, is a good example of controlling the recurrence and metastasis of malignant tumors.