Malignant tumor is a systemic disease, which not only grows locally invasively and destroys normal tissues and organs, but also consumes a large amount of nutrients in the process of growth, coupled with the toxic substances produced by cancerous tissues affecting the vitality of the organism, which results in a series of nutritional and metabolic disorders for the patients, resulting in malnutrition, which gradually reduces the resistance of the patients’ body, aggravates infections or leads to death due to failure of the vital organ functions. The result is malnutrition, which gradually reduces the resistance of the patient’s body, aggravates infection or leads to the failure of important organs and death. Therefore, it is a very important issue to study the improvement of nutrition of tumor patients and understand the diet and living of tumor patients. Chen Peifeng, Department of Oncology, Zhejiang Provincial Hospital of Traditional Chinese Medicine On the issue of paying attention to diet and nutrition after the onset of disease, the motherland medicine has always paid more attention to it. Ancient medical doctors in China combined food nutrition and clinical therapy very early, and developed it into food therapy and edible medicine. As early as in the “Nei Jing” mentioned: “poison attack evil, five grains for nutrition, five fruits for the help, five animals for the benefit of five dishes for filling, the smell of the combined and served to replenish the essence.” Explained that when the drug treatment so that the disease has gone most of the evil, it should be grain and fruit, meat, vegetables and other foods to nourish. Sun Simiao of the Tang Dynasty pointed out that “food therapy does not heal, and then order medicine.” Pointing out the importance of food therapy in the treatment. Another example is Zhang Jifeng said: “but the internal observation of self-nurturing, thin flavor, avoid aroma and dry, quit depressed and angry, can get full peace.” Wang Kentang said: “must be avoided outside the six obscenities, the internal section of the seven emotions, diet and self-nurturing.” That is to say, after a person falls ill, in addition to applying medication, he must pay good attention to diet and nourishment, especially for patients with carbuncle, sores and poison, etc., they should pay more attention to it. So how do tumor patients carry out dietary nourishment? How to supplement nutrients correctly? Cancer patients should avoid eating and the advantages and disadvantages of avoiding food, etc. On this issue, some patients’ family members are often eager to get a more satisfactory answer. However, there are two very different claims and views on this issue. One is one-sided pursuit of nutrition, that any food should not be avoided, and any food containing nutrients can be eaten, and avoiding food will affect nutrition, cause malnutrition and weaken the body’s ability to resist diseases; the other is to over-emphasize the avoidance of food, and believe that all “hairy things” and meat dishes and even some vegetables can not be eaten, otherwise it will make the tumor easy to develop and deteriorate, generalize and not analyze, and everything is to be avoided. Without analyzing, everything is forbidden. These two views are one-sided and do not conform to the objective reality. We believe that diet has a certain relationship with the development of disease, which is an objective fact. In the treatment of cancer, in addition to the application of medication, attaching importance to dietary taboos and adopting appropriate dietary regulation can effectively alleviate the condition, alleviate the symptoms, strengthen the body, prevent and delay the occurrence of malignant stasis, prolong the survival period, and even promote the cure of the tumor. In our opinion, it is very necessary to increase nutrients for cancer patients and pay attention to eating more food which is beneficial to the nutrition of the body, especially increasing protein and vitamin, to increase the ability of the body to resist disease and prevent the occurrence of malignant stasis, so as to compensate for the consumption of the body by cancer tissues. Because most of the tumor patients have big nutritional consumption, poor appetite, weak physique, and even have serious anemia, etc., therefore, they should choose some nutritious and aromatic foods that are easy to digest and absorb, such as meat, fish and shrimp, eggs, dairy products and fresh vegetables, fruits and mushrooms, mushrooms, fungus and other mushrooms in their diet to improve appetite, replenish qi and blood, and adjust the functions of organs and bowels. Function. However, when giving diet to cancer patients, it should be applied flexibly according to the site and nature of cancer, patient’s physique and dietary habits. Lung cancer patients often have symptoms like cough, shortness of breath, blood in sputum, etc. At this time, they should be given nutritious diets, and can choose some almonds, jellyfish, water chestnuts, lilies, lotus root, lotus seed, pears, white fungus, etc. to relieve cough and resolve phlegm, nourish yin and moisturize lungs, as well as milk, soya bean milk, ducks, lean meat, animal livers, fresh vegetables, fruits and so on, and avoid the nourishing and wetting and phlegm-producing meat, fishy, fatty and greasy foodstuffs, and the smoke, liquor, wine and blood-intoxicating food, which hurt yin and move the blood, and the foodstuffs which hurt yin and move the lungs. Avoid stimulating foods such as smoke, alcohol, pungent and spicy foods that hurt yin and move blood. Patients with esophageal cancer often have progressive difficulty in swallowing and obstruction in eating, so it is very important to increase nutrition for patients in early stage in a timely manner and try to supplement protein, vitamin, sugar and fat in diet. Generally speaking, patients with esophageal cancer should avoid eating cold food in addition to avoiding pungent, spicy and rough food, and should eat more beans, umeboshi, lettuce, eggs, meat, fish, shrimp, dairy products, fruit juice, and so on. Gastric cancer patients usually have indigestion symptoms in early stage, so they should eat as little as possible crude fiber food, and should mainly eat soft food, easy to digest food, and avoid stimulating food such as pungent, spicy, tobacco and alcohol, and over-heating, over-cooling, so as not to cause vasodilatation and bleeding and intestinal and gastrointestinal spasm, and they should eat more rice kernel, lotus root powder, monkey head mushroom, lily, bean sprouts, sesame seed, fruit juice, liver, lean meat, milk, soybean milk and so on. Patients with intestinal cancer often have the symptom of stool change, such as those with pus and blood in stool, they can eat more figs, black fungus, white lentils, capers, apples, etc. If the stool is not passable, they should be given fiber-rich food, such as potatoes, sweet potatoes, young leafy vegetables, bananas, pears, honey, radish, and meat, eggs, milk products, etc. Avoid chili peppers, peppercorns, coffee, alcohol and tobacco, high-fat and coarse-fiber food. Patients with liver cancer and pancreatic cancer generally take low-fat and easy-to-digest food as the main food, and eat more fresh vegetables, fruits, eggs, milk, and animal livers containing a lot of vitamin K, spinach, garlic, green beans and so on. When the patient has abdominal distension and ascites, it is advisable to eat more rice kernel, red bean, green bean, winter melon, watermelon and other light seepage and diuresis products, and avoid overeating. In addition, patients with thyroid tumor, cervical lymphoma, craniocerebral tumor, etc. should pay attention to increase a variety of nutrients in their diet, but also eat more asparagus, garlic and other foods that have the effect of softening and dispersing the knots. During or after radiotherapy, there are symptoms of loss of fluid in response to radiation, dry mouth and tongue, red tongue with little moss, when try to increase some sweet and cool products that nourish yin and generate fluids, such as lotus root juice, water chestnut, pear juice, loquat, green beans, watermelon, etc., and avoid foods such as fennel, cinnamon stick, chili, onion and garlic that are aromatic and spicy. During or after chemotherapy treatment, it is advisable to supplement protein-rich foods such as lean meat, fish, animal liver, jujube, black beans and so on. For chemotherapy reaction caused by loss of appetite, indigestion, loose stools, diarrhea, etc., and when to increase the spleen and stomach food such as rice kernels, white lentils, radish, hawthorn, jujube. Post-surgery patients, qi and blood deficiency, can eat more discretion to nourish the qi and blood of yam, jujube, cinnamon, walnuts, sesame seeds, lotus seeds, lean meat, river fish, eggs, and dairy products. If the spleen and stomach transport and transformation function is still available, patients with good appetite, you can also choose some food vegetables, but also has an anti-tumor effect of food and food. Such as chestnut, cichlid mushroom, rhododendron, fig, raw rice kernel, water chestnut, kelp, seaweed, etc., combining food nutrition and food treatment. In addition to the above dietary taboos for different diseases, the nature of food should also be emphasized. Since there are differences in the nature and taste of food such as cold, hot, warm, cool and sour, sweet, bitter, pungent, salty, etc., a reasonable diet also needs to be selected according to the patient’s condition of cold, heat, deficiency, actuality and the digestive function of the spleen and stomach. If the cancer patient manifests as heat and fluid deficiency, it is not suitable to eat red ginseng, antler velvet, cinnamon, mutton, dog meat and other warm and hot nature of yang tonic products, in order to help the fire evil and affect the condition, and should choose some food and foodstuffs with heat-cleansing and detoxifying effect such as amaranth, caper, thistle, etc., in order to be beneficial to the patient’s organism; such as the cancer patient manifests as cold form, cold limbs, lack of yang and weakness of qi and blood, in addition to applying medication, it needs to be supplemented with Nutritional support should be given with nutritious food and foodstuffs such as cinnamon, red dates, red ginseng, pork, black fish, etc. in order to strengthen the body; if the cancer patient manifests weak spleen and stomach, poor appetite, he should avoid raw and cold fruits and use some sweet, warm and aromatic food and foodstuffs such as Chen Pi, Buddha’s hand, Chinese yam, pepper, cardamom seeds, etc., to wake up the spleen and open up the stomach and improve the appetite; if the patient manifests dysfunction of the transportation and digestion of the spleen and stomach, abdominal distension, loose stools, etc., he can be given with white lentil, If the patient shows that the spleen and stomach are out of order in transportation and digestion, bloating and loose stools, then white lentil, cardamom nut, lycopodium, fennel, hawthorn, hexagram, etc. can be given to reduce the symptoms and improve the appetite. In conclusion, it is of certain positive significance for cancer patients to supplement a lot of nutrients, eat more fresh vegetables, fruits and fishes, and eat less greasy food, and pay attention to and protect the function of spleen and stomach of tumor patients, which is the “foundation of nature” to inhibit the development of tumors. For certain foods that are more familiar among the working people, especially the so-called “hairy food”, under certain circumstances, it will really affect the therapeutic effect. For example, the condition of a lung cancer patient had been stable for a long time after taking medication, but after eating irritating chili peppers, cigarettes and wines for several times due to the patient’s lack of attention to diet, the symptoms of coughing, chest pain, fever and so on reappeared, which led to further deterioration of the condition. In a case of esophageal cardia cancer patient, after more than five months of treatment with traditional Chinese medicine, the symptoms had been relatively stable, the feeling of dysphagia and dietary obstruction basically disappeared, and the mass in the original lesion area on x-ray film was also reduced and improved, and then after eating sorghum wine and pork several times, the patient felt the obstruction and difficulty in eating again, which became more and more serious day by day. Of course, it may be an accidental coincidence here, but from the above two cases, it can be seen that it is still very necessary for tumor patients to avoid eating some stimulating foods at the onset stage, and the avoidance of food does have some relationship with the prognosis of the disease to a certain extent. Of course, some patients did not pay attention to “abstaining from food”, and there was no recurrence and metastasis, the reason for which needs to be further studied. We believe that, in general, smoke, alcohol and pork and excessive spicy stimulating food is not advisable to eat, or even should be avoided. For some vegetables and fruits containing vitamins and proteins such as pork and river fish, it is not necessary to be rigid in order to maintain a certain level of nutrition for the patients and increase the body’s ability to resist diseases. Therefore, the dietary nutrition and dietary taboos of cancer patients should be different from disease to disease and from person to person, and should be mastered in a discriminative and flexible way, and should not be stipulated in a general way as to what can be eaten and what can not be eaten, but should be based on the function of spleen and stomach of the patients as well as the condition of the patients’ cold and heat and the deficiency of the patients’ strength and strength. We think that the recipes of tumor patients should not be too narrow, and the taboo need not be too strict, and should be given the necessary food nutritional supplementation combined with treatment. Nutritional deficiency and inappropriate excessive intake of certain nutrients will cause adverse effects, while reasonable and appropriate nutrition for cancer patients can better accept anti-tumor treatment, mobilize and improve the body’s immune function, prolong the life as well as promote the patient’s recovery, which has its certain positive significance.