Diabetes mellitus is a group of metabolic diseases characterized by chronic increase in blood glucose (referred to as blood sugar) levels, caused by the secretion and/or action of insulin. Diabetes mellitus is a common and prevalent disease, and its prevalence is rapidly increasing with the improvement of people’s living standards, aging population, and lifestyle changes. The causes and pathogenesis of diabetes are not yet fully understood, and all medical experts now believe that diabetes is not a single disease, but a syndrome caused by a combination of factors, including genetic and environmental factors. So, if we have diabetes, in addition to taking medication to control blood sugar, how should we pay attention to our normal diet? Here I will talk about the dietary treatment of diabetes. 1, sugar and alcohol should be strictly controlled, such as white sugar, brown sugar, candy, sugar-containing pastries, cookies and bread,, preserves, sweets,, rice wine, beer and all other alcohol. 2, animal fats such as butter, lard should be strictly limited, change to eat peanut oil, soybean oil, canola oil, corn oil, etc. 3.Minimize or avoid eating animal offal (brain, liver, intestine, lung, heart, kidney), egg yolk, fish roe, fried and roasted food. According to the condition and the patient’s physical condition and working condition, etc., the daily staple food is controlled at 250~400 grams. Eat more vegetables, together with some meat, dairy and beans, etc., and increase or decrease appropriately with the condition. For children, pregnant women, lactating mothers and patients with malnutrition or wasting diseases, such as tuberculosis and liver cirrhosis, the quantity and quality of food should be increased as appropriate, while obese and overweight patients should be reduced. V leafy vegetables and melons can be eaten with confidence, such as choy sum, cabbage, cucumber, cucumber, etc. can be eaten at will. Onions, mushrooms, pumpkin, bitter melon, winter melon, sesame, etc. are more beneficial to this disease and can be eaten more often. Vegetables such as tomatoes and leeks should not be eaten. In general, sweeter fruits such as lychee, longan, mango, banana, plantain, sugar cane, persimmon, papaya and other fruits should not eat as much as possible, apples, pears, oranges, pineapples, mandarins, etc. can be eaten in moderation.