Elderly people over 80 should develop a reasonable diet structure and habits according to their own situation, mainly through the following ways of intervention: 1. The diet of elderly people over 80 should be light and easy to digest, with more vegetables and coarse grains, with fish, meat, eggs, milk and fruits, and should control the intake of oil, salt and sugar. Because the elderly over 80 years old are prone to hypertension, diabetes, hyperlipidemia and constipation, indigestion and other diseases, eating more vegetables and fruits is conducive to the prevention of three high and atherosclerosis, can keep the bowel movement smooth, so as to prevent cardiovascular diseases and digestive system diseases. 2, as far as possible to paste food, such as rice, rice paste, noodles, etc., because the elderly elderly swallowing function is poor, eat paste food 3, try to eat less and more meals, do not eat too much at a time, eat more meals can reduce the burden on the gastrointestinal tract and heart, which is conducive to the absorption of nutrients in the elderly.