Patients with hyperglycemia should pay attention to the diet to control the calories, eat more vegetables as well as eat the right amount of fruits, etc. to maintain a healthy habit in the diet. It is important to control the diet as the basic way of hyperglycemia treatment.1. Control the total calories eaten every day, according to the standard weight, the formula is height-105, and provide energy according to 30 calories per kilogram of body weight. If the patient is a heavy worker, the calories can also be raised upwards, for example to 35 calories. The distribution of the diet for the whole day can be 1/5 in the morning, 2/5 at noon and 2/5 at night, of which carbohydrates should account for about 50% of the whole day’s calories, preferably one meal a day is to eat mixed grains, coarse grains, such as millet, corn, buckwheat, oats, etc. The intake of carbohydrates should not exceed half a pound, and eat less food high in oil, fat, sugar and salt; 2. Eat more fresh in the diet Vegetables are rich in dietary fiber and contain a large amount of vitamin B1 and vitamin C. For patients with high blood sugar, due to the disorder of sugar metabolism, resulting in the disorder of sugar, lipid, protein and electrolyte metabolism, regularly eating more vegetables can replenish trace elements and electrolytes, which is beneficial to the body; 3, in the case of hyperglycemic patients with basic blood sugar control, they can eat a small amount of Low-sugar fruits, including apples, pears, oranges, oranges, grapefruit, kiwi, passion fruit, etc., which can be eaten in moderation. Eat less fruits with high sugar content, including banana, pineapple honey, sugar cane, durian, jujube, lamb’s quarters honeydew melon, fruits with high sugar content are easy to lead to excessive energy intake after eating, which is not conducive to blood sugar control; 4. Since hyperglycemic patients usually have certain metabolic disorders, intake of fats should try to choose vegetable oils and fats containing unsaturated fatty acids, such as corn oil, sunflower oil, flaxseed oil, deep-sea fish oil, etc. In order to avoid complications of hyperglycemia, it is important to eat less fatty meat and animal offal to reduce the intake of saturated fatty acids. In conclusion, diet control is the basic treatment for hyperglycemia patients, and other treatments work on the basis of diet treatment. If the diet is not controlled and only medication is administered, it will easily cause hypoglycemia. Patients’ diet should be adjusted by their own initiative, while increasing a certain amount of exercise. After diet and exercise control, those whose blood sugar still does not reach the standard should intervene with hypoglycemic drugs and use insulin if necessary.