There is no special dietary requirement for patients with radiation pneumonitis, they should pay attention to replenish enough protein, eat more fresh vegetables and fruits, and at the same time, they should eat a light diet. Radiation pneumonia patients may cause the body to consume more energy in the early stage, should be supplemented with high-quality protein such as lean meat, eggs, soy products, milk, walnuts, etc.; eat more fresh vegetables and fruits, keep a light diet, avoid eating spicy stimulation, too greasy food such as fat meat, onion, ginger, leeks and so on. Radiation pneumonia is a non-infectious inflammation caused by damage to normal lung tissue in the radiation field after radiation therapy, which requires regular medical treatment and assessment of the changes in the condition.