With the improvement of our people’s living standard and the change of dietary structure, the obese or overweight population is gradually rising, and the resulting series of health problems such as coronary heart disease are also on the rise. First of all, let’s understand what obesity means. Obesity is the abnormal increase of fat storage in the human body. Standard weight (kg) = height (cm) – 105, more than 10% of the standard weight for mild obesity, more than 20% for moderate obesity, more than 30% for severe obesity. Clinically, obesity is defined as exceeding the standard weight by 20%. Studies have shown that the incidence of coronary heart disease is higher in obese individuals, especially in those who gain weight in a short period of time or are severely obese, and that the average weight of patients with coronary heart disease is higher than that of patients without coronary heart disease. A Framingham Heart Study looked at 2252 men and 2818 women over 26 years of follow-up and found that the incidence of coronary heart disease increased with increasing indicators of obesity and that the risk was greater in younger people. among men under 50 years of age, the risk of coronary heart disease was about twice as high in the heaviest weight group as in the lightest weight group. In women of the same age, the risk of coronary heart disease increased by 2.4 times in obese people. Moreover, the risk of coronary heart disease is higher in abdominal obesity characterized by excessive abdominal fat. So why are obese people prone to coronary heart disease? First of all, the insulin sensitivity of obese people is poor, it is difficult to consume blood sugar in the body, and the excess nutrients are easily stored in the body in the form of fat, plus most obese people are over-nourished and prone to hyperlipidemia, leading to coronary artery atherosclerosis. Secondly, obese people increase subcutaneous fat, the heart needs to increase blood discharge to maintain the peripheral blood supply, coupled with excessive fat deposition in the pericardium affects the heart contraction and diastolic function, thus increasing the burden on the heart. Finally, obese people are prone to hyperlipidemia, blood viscosity, coupled with less physical activity, resulting in coronary artery circulation stagnation, and obese people are prone to hypertension, these will cause coronary artery endothelial damage. Therefore, obesity has obvious adverse effects on many risk factors of coronary heart disease. Obese people should have a reasonable diet, less oil and salt, stop smoking and limit alcohol, increase exercise, have regular medical checkups and maintain a healthy psychology, so as to minimize the impact on heart health.