In general, there is no strict contraindication in lung adenocarcinoma diet, there is nothing absolutely cannot be eaten, but try to avoid eating smoked and baked food, fried food, spicy food and so on. Lung adenocarcinoma belongs to malignant tumor, which generally occurs in the periphery of lungs. Although there is no need to strictly abstain from eating, but in general, it is advocated that patients should eat light diet, and try to take nutritious and easy-to-digest food as the main food, while avoiding the following food, which is more favorable to the condition. 1. Smoked and barbecued food: such as barbecued lamb chops, sausage, smoked fish, etc., this kind of food has more carcinogens, oil content, and the seasoning has a certain irritation, long-term excessive consumption will aggravate the clinical symptoms, and have a negative impact on the condition. 2. Greasy food: for example, deep-fried food such as oil cake and doughnut, as well as fried chicken, cream and animal oil, etc., should be avoided by patients with lung adenocarcinoma. Because there will be respiratory symptoms such as coughing and phlegm during the period of illness, excessive consumption of greasy food may aggravate coughing and phlegm and hinder phlegm discharge, so the intake should be reduced. 3. Spicy food: including raw garlic, ginger, mustard, chili peppers and so on. This kind of food is more irritating, and some lung adenocarcinoma patients will have gastrointestinal symptoms such as loss of appetite, and excessive consumption of this kind of food may aggravate stomach discomfort. Besides, spicy food will have adverse effect on airway, which will aggravate coughing and phlegm, in addition to that, alcohol should be avoided. Besides paying attention to diet, patients with lung adenocarcinoma should also maintain a happy mood, actively quit smoking, exercise moderately and develop good living habits. After diagnosis, they should cooperate with doctors for active treatment, so as to avoid delaying the disease.