Patients with invasive lung adenocarcinoma can eat fish, and generally there is no special limitation on the species of fish. Just pay attention to the way of fish processing and cooking, it is generally recommended to eat steamed, stewed, boiled and other ways of processing mature fish, and eat less or not eat fried, pan-fried or salted fish. Fish belongs to the seafood food, generally contains high quality protein, lecithin and other nutrients, of which protein not only supplemental nutrition, but also can enhance the patient’s resistance and immunity, so appropriate to eat some for the patient is beneficial. However, clinical attention should be paid to the fact that the best way to eat fish for invasive lung adenocarcinoma is to adopt a healthy cooking method, avoiding frying and deep-frying to make the food too greasy, and salted fish can easily produce carcinogenic nitrosamines and other compounds. Specific dietary attention is recommended to consult a professional doctor.