After receiving various treatments, cancer patients also face the problems of health recovery and prevention of recurrence and metastasis; therefore, diet should be considered around health recovery and prevention of recurrence and metastasis. Whether the diet structure is correct and reasonable has a close relationship with the prognosis, treatment effect and recovery of cancer. Tumor patients are often weak, so it is very necessary to strengthen nutrition. In principle, high nutrition and comprehensive nutrition are emphasized. In terms of therapeutic sense, more tonic foods should be chosen. Some people mistakenly believe that cancer patients suffer from cancer because there is “poison” in their bodies, so they should be treated with detoxifying and detoxifying drugs and food, but not with “tonic” method, nor should they enhance nutrition, and they want to starve tumor cells to death. To arrange the diet of tumor patients, besides considering the nutritional factors, we should also pay attention to making full use of the anti-cancer substances in food. It is advisable to choose foods with immune function, cancer prevention and anti-cancer effects, such as white potato, soybean products, coix seed, celery, garlic, carrot, asparagus, tomato, fig, kiwi, gourd, hawthorn, shiitake mushroom, mushroom, fungus and so on. Here are some examples: corn: corn is high in carotene, but also contains a lot of plant fiber and a lot of lysine, which can significantly inhibit the generation of tumor cells; corn is extremely rich in selenium, selenium is a strong antioxidant, 500 times higher than vitamin E, can swallow free radicals and other peroxides in the body, keeping cell membranes and chromosomal genes from damage. In addition, the magnesium in corn also contributes to the ability to fight cancer. Sweet potato: also called groundnut, sweet potato, white potato, some people call it “the first anti-cancer food”, is considered to be an excellent food to get rid of disease and prolong life, weight loss and health care. Most of our urban residents no longer eat groundnuts, some people occasionally buy baked white potatoes to try fresh. Sweet potatoes have powerful anti-cancer function. In the sweet potato found a dehydroepiandrosterone substance, it can prevent the occurrence of intestinal cancer and breast cancer. The secret of longevity for many longevity stars is that they like to eat groundnuts. Job’s Tears: Job’s Tears contains a variety of medicinal ingredients such as Job’s Tears lipid, Job’s Tears oil, Job’s Tears, glutathione, and alkaloids. Job’s tear fat not only has a tonic effect, but also has an inhibitory effect on a variety of tumor cells, and can enhance the lifting of white blood cells and platelets. The active ingredients of Coix seeds have been extracted from the anti-cancer herbal preparation Conlet, which has a good therapeutic effect on lung cancer and so on. The regular consumption of coix seed porridge not only has a good adjuvant effect on tumor treatment, but also has a better effect on the symptoms of weakness, white blood cell reduction, loss of appetite, abdominal distension, ascites, swelling of the face and limbs of cancer patients undergoing chemotherapy and radiotherapy. It is really an ideal health food against cancer, and cancer patients often eat it to help them recover. Kelp: Kelp is rich in fiber, which can promote the excretion of carcinogens in the intestinal tract. Kelp also contains a large amount of calcium, which has anti-cancer effects. Epidemiological surveys have found that people who eat calcium-rich foods have a low incidence of bowel cancer. Konjac: also known as Gou weak, snake six valley, for the South Star family of plants konjac bulb. Rich in glucomannan, protein, fructose, as well as starch, cellulose, with the effect of removing blood stasis and dispersing stagnation, moving stasis and swelling. The glucomannan in konjac can absorb water expansion, stimulate gastrointestinal motility, laxative, promote the excretion of feces and intestinal harmful substances, with the effect of laxative cancer prevention, not only to treat constipation, colon cancer prevention. Sea cucumber: Sea cucumber is a delicious and high-class tonic on the table. Sea cucumber contains a substance called mucopolysaccharide, which can inhibit the growth and metastasis of cancer cells. In addition, sea cucumber extracted from sea cucumber glands has an inhibitory effect on tumors. Garlic: Garlic can prevent various cancers. The sulfur-based compounds in garlic are the effective ingredients for eliminating nitrite and blocking endogenous amine nitrite in human body, inhibiting the synthesis of amine nitrite by nitrite-reducing bacteria in the gastrointestinal tract, thus reducing the incidence of stomach cancer. Garlic is best eaten raw or mashed and stirred with sesame oil for immediate consumption. This is because garlic is crushed or chewed so that the allicin-producing enzyme it contains can be released, turning allicinogen into allicin and exerting its anti-cancer effect. Kiwifruit: The flesh contains a large amount of vitamin C and is a high-quality source of vitamin C. Kiwifruit is rich in substances that prevent the synthesis of carcinogens in the human body, and regular consumption of kiwifruit can prevent the occurrence of cancer. Fig: It has the effect of stomach and intestinal health, swelling and detoxification. Fig aqueous extract has the effect of anti-Ehrlich sarcoma, spontaneous breast cancer in mice, metastatic sarcoma in rats, causing tumor necrosis, delaying the development of transplanted adenocarcinoma, leukemia, lymphosarcoma and promoting lesion reduction. The benzaldehyde contained with β-cyclodextrin prevents induced papilloma and is clinically effective against adenocarcinoma and squamous epithelial cell carcinoma. It has preventive and therapeutic effects on tumors such as esophageal cancer, stomach cancer and bladder cancer. Shiitake mushroom: It is a precious food with health benefits and anti-cancer effects. There is also a kind of glucosidase in shiitake mushroom, and this substance can improve the body’s anti-cancer ability. The most prominent one is the mushroom polysaccharide contained in it, which has a strong anti-cancer effect. Shiitake mushroom polysaccharide can enhance cellular and humoral immunity and has a similar effect to that of a tonic. Shiitake mushrooms can be taken in soup for its supplementary therapeutic effect. Patients after cancer surgery can take shiitake mushroom soup to prevent cancer cells from metastasizing, and healthy people can eat shiitake mushroom to prevent cancer from occurring. In conclusion, according to the principle of “three parts of treatment and seven parts of nourishment”, we should reasonably adjust the diet according to the patient’s specific conditions, strive to diversify and strengthen nutrition, and promote the recovery of the body.