As we all know, there are more and more people who are overweight or obese. Objectively speaking, overweight and obesity are the result of excessive accumulation of body fat due to energy intake exceeding energy consumption. Scientific research has found that different individuals respond differently to energy intake, the thermogenic effect of food and weight regulation, and are influenced by genetic characteristics (such as physiology, metabolism) and lifestyle (such as social, behavioral, cultural, dietary, activity level and psychological factors). Even if genetic factors exist, the development of obesity is the result of the interaction between various factors such as environmental factors and lifestyle. This article will specify the obesity susceptibility factors. A, family genetic tendency It is not difficult to find, the family obese people more, their children suffer from obesity risk is high. A number of studies show that simple obesity has genetic tendency, some twins, adopted children family and family lineage investigation found that obesity has a certain family aggregation. Both parents are obese, 70%-80% of the children are obese, one of the parents (especially the mother) is obese, 40% of the children are fat. Research shows that the role of genetic factors on the formation of obesity accounts for about 20-40%. At present, obesity has become one of the world’s most concerned about the disease. Second, excessive intake of high-calorie diet With China’s economic development and food supply, people’s basic needs for food energy to meet after the dietary pattern has changed greatly, high protein, high-fat food consumption has increased greatly, the total energy intake often exceeds energy consumption. Compared with the traditional dietary pattern in China, people in many cities, especially in large cities, consume more animal fats and proteins rich in energy, and less cereals, and the intake of fresh vegetables and fruits rich in dietary fiber and micronutrients is also low. It has been proven that diets with high fat content and low density of other nutrients have the greatest potential to cause obesity. Therefore, limiting total energy and fat intake is a basic measure for weight control. In addition, eating behavior is also an important factor affecting the occurrence of obesity. Skipping breakfast often leads to a higher intake of food at their lunch and dinner, and an increase in the total amount of food consumed during the day. Our dietary guidelines propose that the food energy distribution and interval time of three meals should be reasonable, generally 30% for breakfast and 30% for dinner, and 40% for lunch. Eating too much in the evening and relatively little exercise will make the excess energy in the body into fat and stored. Now many fast food (especially take-out fast food) because of its convenience, fast and popular, but fast food is often rich in high fat and high energy, while its composition is relatively monotonous, regular consumption will lead to obesity, and may cause certain nutrient deficiencies. Eating behavior is bad, such as regular overeating, nighttime extra meals, like snacking, especially feel boring life or eat too much snacking while watching TV, is an important reason for many people to become obese. In addition, because the food source is richer, the amount of meal preparation in the family is often more than the actual amount needed, in order to avoid waste and eat the extra food (especially housewives), may also be one of the reasons for over-eating. Second, the lack of exercise and physical labor With the modern transportation is increasingly perfect, occupational physical labor and domestic work to reduce the amount, people in the static life of the time to increase. Most obese people are relatively inactive; sitting and watching TV is the main leisure pastime of many people in their spare time, becoming one of the main reasons for obesity; in addition, some people are disabled or suffer from certain diseases and reduce physical activity; some athletes fail to reduce their energy intake in time after stopping regular exercise, which may lead to excess energy stored in the form of fat. Regular physical activity or exercise not only increases energy consumption, but also increases the body’s metabolic rate, which is conducive to maintaining the body’s energy balance, and can also enhance the function of the cardiovascular system and the whistling system. Because high-intensity strenuous exercise is not easy to adhere to for a long time, and in the short term of this high-intensity exercise, mainly to consume the energy provided by carbohydrates (muscle glycogen, liver glycogen, etc.) in the body, rather than first consume fat. In the case of medium- and low-intensity physical activity, more mobilization of body fat decomposition to provide energy. In addition, often participate in exercise than infrequent exercisers resting metabolic rate is high; in the same energy consumption exercise, often exercise can more mobilization and use of body fat stored, more conducive to the prevention of overweight and obesity. Fourth, all aspects of social factors global obesity prevalence of the general rise and the social environment factors related to the change. Economic development and modern lifestyle have a great impact on eating patterns. In our country, as family members reduce, economic income increases and purchasing power increases, food production, processing, transportation and storage technology has improved, can choose the food variety is more abundant. As women move more widely into all walks of life, there are fewer opportunities to prepare meals for the family at home; combined with increased household income, there is an increase in eating out and purchasing ready-made processed and fast food, many of which contain too much fat. Especially those who often go to restaurants for parties and dinners often eat too much. In the event of trouble, anger and other unhappy things, some people tend to eat to dispel sorrow. In addition, regular eating too much meat (especially pork contains more fat and protein) easily lead to digestive organs (intestines, liver) and kidney overload and fat accumulation in the body, but also not good for health. Therefore, reducing dietary energy intake, increasing physical activity to increase energy expenditure, and controlling energy balance are the basic conditions for maintaining good health.