Patients with granulocyte deficiency are highly susceptible to infections due to the extreme deficiency of immune cells, and dietary control is very important to limit the entry of potentially harmful bacteria into the gastrointestinal tract. Good dietary control is of great importance for their prognosis and regression. Therefore, it is important to pay attention to proper nutritional intake and dietary hygiene. Specific details are as follows: 1. Consume filled, packaged or cooked foods. Such as canned, packaged or cooked meat and eggs, or food cooked at home at high temperature (meat should be maintained above 70℃ for 2 minutes; deli food, luncheon meat, etc. should be re-cooked to 74℃). In addition to the above and hospital cooking food is prohibited, such as buns, steamed buns, bread, etc. purchased outside. 2, forbidden raw fruits, vegetables, nuts. Such as raw food apples, strawberries, pears, celery, lettuce, cabbage, raw peanuts, etc.. But can be appropriate to eat thick-skinned fruits and shelled nuts, such as oranges, oranges, bananas, watermelon, walnuts, chestnuts, etc.. Appropriate consumption of canned fruit, pasteurized juice, etc. 3, the prohibition of hard, greasy, fried, spicy, irritating, dairy products and other foods. For example, cakes, doughnuts, chili, milk, etc. 4, forbidden to drink raw water. It should be boiled and dried to warm and cool to drink. Can boil water to drink tea or coffee. 5.Wash your hands in time before meals, after defecation and after contact with dirt to prevent digestive tract infection.