After chemotherapy for lung adenocarcinoma, a balanced diet is needed, with more high protein, vitamin-rich and fiber-rich foods as appropriate, which can promote body recovery to a certain extent. Chemotherapy is an important way to treat lung adenocarcinoma. Chemotherapy will cause gastrointestinal reactions such as nausea and vomiting, resulting in malnutrition of patients. At this time, attention should be paid to supplementing high-quality proteins, such as eggs, lean meat, beef, pork, milk and so on, which can help improve the nutritional status of patients. In addition, attention should also be paid to supplementing vegetables and fruits rich in vitamins and fiber, such as tomatoes, carrots, apples, bananas, etc., which helps to ensure nutritional balance. Good nutritional status helps to improve the patient’s tolerance to chemotherapy as well as the patient’s immunity, thus improving the patient’s therapeutic effect.