As the main cause of posterior circulation ischemia is atherosclerosis, all in the diet usually give patients the following advice: 1, more high-quality protein is the brain memory thinking of the basic material, high-quality protein can make the cerebral cortex in a good state of physiological activity, and high physiological efficiency of protein, high absorption rate. Commonly have meat, poultry, eggs, milk, fish, shrimp. 2, intake of essential fatty acids and lecithin rich in essential fatty acids food such as sesame, walnuts, pine nuts, pork heart, cuttlefish and pressed peanut oil, olive oil, flax oil, etc.. In addition, chicken, rabbit meat, eel contains more linoleic acid, linolenic acid; animal kidney, blood, brain, shrimp, deep-sea fish (salmon, rhubarb, sardines, tuna …) contains more DHA and EPA. rich in lecithin are egg yolk, oysters, sesame paste liver, kidney, brain, soybean products, etc. 3, control refined processed sugar more intake of grain, fruit, longan, mushrooms, vegetables, honey and unrefined cereals, etc. 4.Maintain the slight alkalinity of blood more alkaline food such as vegetables, beans, milk, mushrooms and algae, tea, etc. 5.Supplement rich in vitamin A, C, E food. Vitamins A, C, E have strong antioxidant properties and can eliminate free radicals, which is extremely important to prevent aging and improve cerebral blood circulation. It has been proven that when vitamin C is less than 11 mg in the blood, a person’s IQ decreases significantly. The main sources of vitamin A are: yellow green vegetables, tomatoes, carrots, corn (these vegetables and grains contain more vitamin A original, i.e. more carotene), while animal liver, eggs and cod liver oil contain more A. The main sources of vitamin C are: fresh fruits, fresh dates, hawthorn, fresh cinnamon, oranges, tangerines, strawberries and other fruits, as well as tomatoes, peppers, cauliflower, bitter melon, green garlic, fresh snow peas and green leafy vegetables. Animal liver and kidney also contain a certain amount of vitamin C. The main sources of vitamin E are: grain germ, wheat germ, egg yolk, beans, hard fruits, leafy vegetables, peanut oil, sesame oil, etc. 6, to pay attention to the intake of fiber. Fiber has no nutritional effect, but has a health effect that cannot be ignored, and it has been listed as one of the main elements of a balanced diet. Dietary fiber can effectively increase water, and stimulate intestinal wall peristalsis, which is conducive to the prevention of constipation, which is often associated with memory loss, dizziness, reduced sensitivity and other symptoms.