Obesity is a chronic, recurring disease that requires long-term treatment. Clinical studies have shown that it is not healthy to lose a lot of weight in a short period of time, and it is easy to rebound. The pursuit of the so-called ideal weight is unrealistic. Moderate weight loss (5% to 10% of the original weight loss) can significantly improve obesity-related complications. The primary goal of obesity treatment should be: 1, at least 5% weight loss, which is sufficient to bring health benefits; 2, to prevent weight rebound, or reduce the rebound as much as possible; 3, to prevent the occurrence of complications or improve the complications; 4, to improve the quality of life. The treatment of obesity is a three-pronged process with diet control, appropriate exercise and safe medication, one cannot be missing. Dietary control should encourage obese patients to carry out a low-calorie diet, maintaining a negative energy balance of about 600kcal per day. The calorie ratio of fat and oil in the diet should be less than 20% to 30%, 55% to 65% of total calories should come from carbohydrates, and no more than 15% from protein. Encourage patients to eat more fresh fruits, vegetables and coarse grains, limit the intake of alcohol and avoid high-fat foods. Exercise is the best measure for weight loss. Patients who continue to exercise after weight loss can not only maintain their weight, but may even continue to lose weight. Exercise includes aerobic exercise and resistance exercise, such as walking, jogging, swimming, cycling, weight lifting, etc. Medication is usually used as part of a long-term treatment strategy for obesity and can only be used as an adjunct to diet control and exercise therapy. Obese patients should fully weigh the risks of continued obesity against the risks of medication to decide whether to pursue medication. Obesity is preventable, it includes: 1. Universal prevention. It is the overall preventive measures, mainly through improving the dietary structure, promoting appropriate exercise and changing the lifestyle, so as to achieve the purpose of universal prevention. 2.Selective prevention. It aims at educating people at high risk of obesity so that they can resist various risk factors. 3.Targeted prevention. It educates people who are already overweight or have biological indicators of obesity, but are not yet obese, with the aim of preventing weight gain and reducing the incidence of obesity-related diseases. And the prevention of obesity disease is to abandon the following bad habits: 1, bad eating habits, including high-fat, high-sugar diet; gluttony, indulgence, dieting, eating too fast, etc. 2, too little physical activity, lazy exercise. For example, watching TV, surfing the Internet, playing games for a long time, using a car as a substitute for walking, being sedentary, sleepy, etc.