Diabetes is mostly caused by improper diet, so diabetic patients need to pay attention to the following aspects of diet: 1. According to their own weight, workload and condition, make a reasonable diet plan under the guidance of a specialist, and allocate the three major nutrients of carbohydrates, proteins and fats according to caloric needs. Usually, carbohydrates account for 50%-65% of the calorie supply, fats account for 20%-30%, and proteins account for 15%-20%; 2, pay attention to regular rationing, do not eat and drink casually; 3, according to the amount of meals, appropriate measurement of one after-meal blood sugar, the next meal can be adjusted; 4, balanced nutrition, not partial or picky eating, to prevent nutritional imbalance; 5, pay attention to a light diet, follow Low sugar, low salt, low fat, no alcohol, no smoking.