If patients with advanced stage of lung cancer do not eat, they can take drugs to promote digestion, place nutritional tubes, liver preservation therapy and parenteral nutrition. 1. For lung cancer patients, if they do not want to eat because of indigestion, they can be given pro-digestive drugs to promote gastrointestinal peristalsis, so as to help increase the amount of food, ensure nutritional intake and improve the symptoms. 2. When the patient does not want to eat or has difficulty in eating due to compression or metastasis caused by the lesion, a nutrition tube can be placed in the gastrointestinal tract and nutrients can be infused through the tube to ensure energy supply. 3. If the patient does not want to eat because of decreased or impaired liver function due to advanced cancer, hepatoprotective treatment will be given, and the patient’s appetite will increase after the liver function improves. 4. If the patient cannot eat due to intestinal obstruction, parenteral nutrition can be given to ensure the energy needed by the body.