Patients with thyroid cancer should follow the common dietary principles for tumor patients, that is, the seven words of diet for tumor patients: “vegetarian, coarse, less, mixed, light, rotten and warm”. 1. “Vegetarian” refers to eating more fresh vegetables and fruits, and less meat and meat. 2, “coarse”: refers to eat more coarse grains, mixed grains, a variety of unprocessed coarse fiber food. 3, “less”: refers to the total amount of food intake should be restrained, it is better to eat less and more meals, which is conducive to the absorption of various nutrients. 4, “mixed”: refers to the recipes should be mixed and wide, eat the full range of food varieties, color, roots, leaves, flowers and fruits to eat. 5, “light”: refers to the diet should be light, as little salt, sugar, MSG and other condiments and various food additives. 6. “Rotten”: Except for fresh fruits and vegetables, all kinds of food should be cooked well, especially for elderly patients with thyroid cancer, which is good for digestion. Cancer patients need to stay away from cold drinks, beverages and frozen foods, especially for elderly thyroid cancer patients with cold spleen and stomach. Since the early or late onset of thyroid cancer has a great influence on the way of surgery for patients, and the wounds of open surgery are generally larger, patients’ physique is slow to recover, therefore, the postoperative diet should be light, easy to digest, easy to absorb, with more high protein, low animal fat, multivitamins, fresh fruits and vegetables to ensure that the organism has sufficient nutritional intake to improve the immunity and increase the progress of physique recovery.