Obesity is a potential risk factor for diabetes, cardiovascular disease and other metabolic diseases and tumors. Whether the goal is external beauty or internal health, weight loss has become a need for most people. In recent years, various means of slimming have emerged in the society. However, scientific and reasonable nutritional diet combined with exercise intervention is currently the most effective and safest means of weight loss. Today we will introduce three dietary patterns for weight loss: first, the total energy-restricted balanced diet (calorierestrictdiet, CRD). Usually, the proportion of intake of major nutrients: fat calorie ratio: 20-30%; protein calorie ratio 15-20%; carbohydrate calorie ratio 40-55%; dietary fiber 25-30g/d. The intake of vitamins and minerals should not be neglected. At present, there are three main types: 1) decreasing by a certain percentage based on the target intake; 2) reducing about 500kcal per day based on the target intake; 3) supplying 1000-1500kcal per day. CRD also makes recommendations for nutritional balance in addition to energy intake restrictions. Recent studies have concluded that the use of nutritional meal replacement methods can balance weight loss and nutritional balance. Second, high protein dietary pattern. In this dietary pattern, the protein supply is generally 20% or more of the caloric ratio, or at least 1.5g/kg body weight. However, this dietary pattern is not suitable for patients with combined chronic kidney disease. Third, the light fasting pattern (intermittentfasting). Also known as intermittent fasting 5:2 mode, that is: 5 days in a week, eat normally, and the other 2 days (non-consecutive), take 1/4 of the usual energy (about 500kcal/d for girls and 600kcal/d for boys) diet pattern.