Most of the tumor patients have spleen deficiency basis, so some medicinal foods can be eaten often, such as barley, lotus seeds, yam, etc., which can be made into porridge and eaten every day. Most of the patients after radiotherapy have yin injury, which manifests as dry mouth, dry throat, dry cough, red tongue, little or no coating, so they should eat foods that nourish yin and moisten, such as lily, pear, white fungus, etc. For patients after radiotherapy for nasopharyngeal cancer, food should not be hard and too acidic, otherwise it will easily damage teeth. The dietary principles of tumor patients include: 1, food should be diversified, don’t stick to a certain kind of legendary special tonic things, and eat mixed. 2, meat and vegetarian, mainly vegetarian, vegetables and fruits should be eaten more. 3, meat should be mainly white meat, red meat eaten less. To be more specific, fish and other aquatic products are appropriate to eat more, pig, beef, lamb less. As long as it does not contain hormone-fed fast-growing chickens and ducks, you can eat, the best natural free-range, but in moderation. 4.Seafood can be eaten, but it can be reduced by half compared with the amount before the disease, but thyroid cancer patients can be prohibited from eating seafood. All kinds of poultry eggs can be eaten, and the best eggs are those from poultry raised outdoors to eat natural food, but one egg per day is enough. 6, health care products as far as possible not to eat, the value is not worth it. 7, cordyceps and ganoderma lucidum spore powder can be eaten, but the commercial hype is too much, and the value is not worth it. After gastrointestinal tumor surgery, food should be light, easy to digest and nutritious, not too nourishing, not to eat easy to produce gas, not easy to digest food, such as soy milk should not be eaten, sweet potatoes and other starch content as little as possible, not easy to digest glutinous rice to eat less.