The diet of patients with chronic obstructive pulmonary disease should pay attention to supplemental nutrition, adjust the diet according to the patient’s gastrointestinal function status, ensure the intake of calories, proteins, vitamins and other nutrients, intake of multi-vitamins, high-fiber, adequate calories and minerals, and supplement the appropriate amount of inorganic salts. Daily dietary intake of calories should be more than 2500 kcal. In addition to ordinary cereals, rice and pasta, you can increase the intake of protein-containing foods, such as milk, eggs and lean meat, and you can supplement fruits and vegetables appropriately for comprehensive nutrition.