The effects of chemotherapy itself on tumor patients’ organism are divided into two categories: 1. Direct effects: Chemotherapy can damage mucous membrane cells and hematopoietic cells, resulting in lower white blood cells, anemia, pain caused by mucous membrane damage in the digestive tract, metabolic changes, and digestive and absorption dysfunction. Dietary support: Food should be light, soft and digestible, avoid coarse, hard, irritating and greasy, and need to be supplemented with protein-rich, vitamin-rich and hematopoietic foods. 2. Indirect effects: nausea, vomiting, anorexia and other discomforts can occur during chemotherapy, resulting in inadequate food intake, malnutrition, taste changes, satiety, diarrhea, constipation, low immunity, increased occurrence of infection, and bad mood Dietary support: heavy, greasy foods should be avoided, and foods that promote appetite, help digestion and improve immunity should be increased. Dietary principles for chemotherapy patients 1, dietary balance based on an appropriate increase in the intake of high protein and high vitamin foods (such as eggs, milk and its products, beans and their products, lean meat, a variety of fresh vegetables and fruits). 2, nausea and vomiting patients diet pay attention to light and good digestion, can take a small number of meals principle. 3, serious reactions can also take two meals, that is, breakfast in advance, dinner delayed. 6:00 am meal, 3-4 hours after the basic emptying of the stomach and then chemotherapy; 7:00 pm chemotherapy after the end of two hours after the meal, in order to facilitate the body to metabolize drugs excretion of toxins. 4, chemotherapy leads to severe stomatitis, esophagitis, swallowing difficulties of patients, pay attention to oral hygiene, often gargle with light salt water, and can be made into food homogenized to drink. 5.Inadequate normal diet, oral multivitamins and trace elements and enteral nutrients can be supplemented.