The recovery of tumor patients is closely related to dietary and nutritional factors. Before and after anticancer treatment, reasonable diet and good nutrition are not only beneficial to promote the repair of damaged tissues and maintenance of immune function and prevention of infection, but also prevent muscle tissue decomposition, maintain physical fitness, improve patients’ quality of life and tolerance and efficacy of treatment, and in the period of recovery from tumors, reasonable diet and good nutrition are also conducive to the prevention of recurrence of tumors. 1. Nutritional risk screening or assessment should be carried out routinely for tumor patients with high nutritional risk, which is conducive to the early detection of malnutrition and early intervention, thus achieving the purpose of twice the result with half the effort. 2. The diet of tumor patients should firstly pay attention to balanced diet and appropriately increase the intake of protein and antioxidant nutrients. 3. If tumor patients can ensure enough energy and protein intake, it will be beneficial to maintain weight stability and nitrogen balance, and reduce complications and mortality. Adequate antioxidant nutrients can neutralize the excess free radicals in the body and reduce the toxic side effects of radiotherapy. 4. It is advisable to adopt low glycemic index, high protein and high fat diet to help stabilize blood sugar and inhibit tumor cell proliferation. Such as limiting foods rich in monosaccharides (e.g. sweets, snacks, sweet drinks) and choosing foods rich in complex carbohydrates (e.g. oatmeal, black rice, mixed beans and rice, mixed noodle buns, whole-wheat bread, buckwheat noodles), monounsaturated fatty acids (e.g. olive oil, tea oil, rapeseed oil, linseed oil, etc.) and foods rich in high-quality protein (e.g. eggs, lean meats, yogurt, northern bean curd, etc.). 5, patients with poor appetite or weak digestive function should pay attention to a small number of meals, increase the small snacks between meals, eat every 2 ~ 3h, take advantage of feeling a little better to eat quickly in order to increase the amount of food; breakfast in particular, eat well; food should be light, soft and well-digested, to avoid coarse, hard, greasy food; use appetizing, digestion-aiding foods, such as hawthorn, white radish, millet porridge, yam, yogurt, etc.; if If eating is difficult due to mouth ulcers or esophageal stenosis, the intake can be increased by changing the character of food, such as chopping the food, making it soft, or making it into homogenized meal with a blender. Patients who have insufficient food intake due to anorexia due to cancer can increase their intake by choosing high-energy, high-protein and high-nutrient-density foods, such as cakes, cookies, sesame sauce, yogurt, nuts, and so on. 7, through oral supplementation of enteral nutrition preparations and products, such as enteral nutrition formula powder, whole camp vegetarian cookies, whole camp vegetarian yogurt, and whey protein powder, multivitamin tablets, etc. are sometimes very effective in improving the nutritional status of malnourished patients. 8, to ensure that 6 to 10 cups of water (1200-2000ml) every day, conducive to the discharge of metabolic wastes in the body. Between meals or 30 to 60 minutes before and after eating soup, can reduce the feeling of early satiety, and will not affect digestion. 9, in general, in addition to gastrointestinal dysfunction, certain metabolic disease states, or are taking medications need to follow the doctor’s advice, do not advocate excessive taboos, so as not to affect the nutritional balance. 10, if pain, nausea, vomiting, anorexia, depression, insomnia and other symptoms occur, you can prescribe some symptomatic drugs, such as antiemetic drugs, painkillers, megestrol, corticosteroids, anti-anxiety drugs. For patients with loss of appetite and dyspepsia, B vitamins, digestive enzymes and probiotics can be supplemented. 11. Appropriate physical activities during anti-cancer treatment have many benefits, such as helping to maintain muscle strength and bone hardness, improving physical strength, reducing stress, treating depression, relieving constipation and so on. If the patient’s physical strength allows, he/she can exercise for 30 minutes every day and more than 5 times in 1 week. If physical strength is low, you can also start with 5 to 10 minutes of exercise per day and gradually increase the amount of exercise until you reach the goal of 30 minutes of exercise per day.