There is no such thing as “what is the best thing to eat” for elderly people with diabetes and high blood pressure. A low-salt, low-fat and low-sugar diet is recommended to ensure a nutritious, comprehensive and balanced diet, and standardized medication should be taken under the guidance of a doctor. 1. In daily life, elderly people with diabetes and hypertension should maintain a healthy diet and follow a low-salt, low-fat and low-sugar diet. Staple foods such as corn, oats and other coarse grains are recommended as the mainstay, and you can eat some spinach, broccoli and other fresh vegetables, strawberries, apples and other fresh fruits, as well as tofu, fish and other protein-rich foods, to ensure that the diet is nutritious, comprehensive and balanced. 2. Elderly people with diabetes mellitus and high blood pressure should also take nifedipine, hydrochlorothiazide, metoprolol and other antihypertensive drugs and glucose-lowering drugs such as acarbose and metformin as prescribed by their doctors, and inject insulin therapy if necessary. Regularly monitor blood glucose and blood pressure to keep them within reasonable limits. Elderly people diagnosed with diabetes mellitus with high blood pressure should actively cooperate with their doctors for treatment and maintain a healthy lifestyle.