Diabetic patients can eat leeks in moderation if they are not allergic to the components of leeks. Diabetes mellitus is a kind of endocrine disorder disease caused by absolute or relative insufficiency of insulin secretion and/or utilization disorder, and the abnormal elevation of blood glucose level is its most important clinical feature. Diabetic patients should follow the principles of diabetic diet, reasonably control the total energy intake of each day and each meal, and reasonably and balanced distribution of various nutrients to ensure the supply of normal nutrition to the body. Foods should be selected more low-calorie, low-fat foods (celery, leeks, spinach and other leafy foods), limiting the intake of high-calorie foods (fried foods). Leek is a low-calorie food, and at the same time rich in a variety of vitamins and fiber. Diabetic patients can consume leeks in moderation if they are not allergic to them. The emergence of diabetes, it is recommended to seek timely medical treatment, standardized treatment under the guidance of professional doctors.