Lung cancer, known as primary bronchial lung cancer, is one of the common malignant tumors and occupies the second place among all malignant tumors. It mostly occurs in people over 40 years old, mostly in men. It is related to long-term smoking, occupational exposure to coal tar and asbestos, air pollution and chronic diseases in the lungs. Common symptoms of lung cancer include: cough, paroxysmal irritating choking cough, no sputum or a small amount of foamy white greasy sputum; hemoptysis or sputum with blood or blood clots; chest tightness and chest pain with pressure or dull pain, the exact location is difficult to describe; shortness of breath; fever. Later, compression and metastatic symptoms appear: invasion of the pleura may cause chest pain and pleural effusion; invasion of the pericardium causes pericardial effusion; compression of the recurrent laryngeal nerve causes vocal cord paralysis and hoarseness; compression of the superior vena cava and the odd vein causes anger in the thoracic veins, cervical and facial edema, dark purple skin, blurred vision, dizziness and headache; invasion of the cervical sympathetic plexus causes Horner’s syndrome: drooping eyelids, sunken eyes, narrow pupils, affected side (1) It is advisable to eat more foods with immune enhancing and anti-lung cancer effects, such as barley, sweet almond, rhizome, oyster, jellyfish, yellow fish, sea turtle, crab, horseshoe crab, ark, sea cucumber, poria, yam, jujube, oyster snake, string bean, mushroom, walnut and turtle. (2) It is advisable to eat white fruit, radish, mustard, almond, orange peel, loquat, olive, orange cake, jellyfish, water chestnut, kelp, purple cabbage, winter melon, loofah, sesame, figs, pine nuts, walnuts, tamari, luo han guo, peach, orange and pomelo. (3) It is advisable to eat cucumber, winter melon, bitter melon, lettuce, eggplant, hairy greens, lily, amaranth, water chestnut, water spinach, stone flowering cabbage, horsetail, plum, watermelon, pineapple, pear, persimmon, orange, lemon, olive, mulberry seeds, water chestnut, duck and green fish. (4) Eating plum, lotus root, sugar cane, pear, cotton, jellyfish, sea cucumber, lotus seed, diamond, kelp, mustard wheat, black bean, tofu, capers, eggplant, milk, carp, turtle, grass carp, squid, yellowtail, snapper, oyster, and tamari is recommended. (5) Foods to reduce the side effects of radiotherapy and chemotherapy: goose blood, mushroom, shark, cinnamon, eel, walnut, snapper, turtle, kiwi, Ulva, golden needle, jujube, sunflower seed, apple, carp, green bean, soybean, red bean, shrimp, crab, silver bean, loach, pond lice, grass carp, mahi-mahi, green tea, snail. Lung cancer diet [Avoid] (1) Avoid smoking and alcohol. (2) Avoid spicy and stimulating food: onion, garlic, leek, ginger, pepper, chili, cinnamon, etc. (3) Avoid frying, barbecue and other hot food. (4) Avoid greasy, sticky and phlegm-producing food.