Eat more foods that moisten the lungs: the purpose is to relieve cough and relieve lung discomfort. It mainly includes auricularia auricula, white radish, kelp, lotus root, bamboo shoots, loofah, pear (cut into pieces and steamed with appropriate amount of sugar), peanut, walnut and so on. In addition, patients can often drink honey water to achieve the effect of moistening the throat and lungs. 2. Eat more fruits and vegetables: Vitamin A can protect respiratory mucosa, and vitamin C can improve immunity and effectively prevent respiratory infections, so timely supplementation is of great significance. There are many such fruits and vegetables, such as cherry, pomegranate, mango, kiwi, carrot, tomato, cabbage, rape, cucumber, wax gourd and so on. To clear phlegm and remove fire. 3. Drink plenty of water: replenish water in time and increase liquid intake, which can correct or prevent water loss, dilute sputum and promote its elimination. Patients should drink plenty of boiled water and add appropriate amount of honey (1 teaspoon is appropriate to avoid being too sweet). 4. Eat more foods rich in protein: mainly high-quality protein, such as milk, eggs, fish, all kinds of lean meat, soybeans and bean products; While supplementing protein, patients should eat carbohydrates in moderation, such as potatoes, peas, lentils, rice, corn flour, grapes and peaches. 5. Avoid frying and spicy food: oily food such as frying is not easy to digest, and it is easy to get angry, which can help wet phlegm, block lung passages and lead to cough and asthma. And spicy foods such as peppers, onions, raw garlic and peppers. After eating, it can help heat to produce phlegm and stimulate bronchial mucosa, making local edema and cough and asthma worse. Therefore, patients with chronic bronchitis should avoid fried and spicy food.