Survey data show that the risk of hypertension increases 5-6 times in obese people aged 20-45 years compared to those with normal weight. Active weight control can significantly reduce the incidence and prevalence of hypertension. The average adult resident of the United States is overweight by 4.5 kilograms, if the average weight of all residents is reduced by 4.5 kilograms, the blood pressure of 50 million hypertensive patients will be lowered to the normal level, which in turn significantly reduces the incidence of coronary heart disease, stroke and renal disease, and the incidence of death and disability. Although there is a lack of large-scale statistical data in China, data from some small sample surveys show similar conclusions. The results of these studies fully demonstrate the importance of weight control for antihypertensive treatment. The mechanism by which weight reduction affects blood pressure is not yet fully understood. In general, weight reduction is mainly achieved through dietary control with increased physical exercise. Reducing caloric intake and salt intake during dietary control can help lower blood pressure, while increasing physical activity can also have a beneficial effect on blood pressure. In-depth studies have shown that it is body fat volume, not weight per se, that is truly associated with blood pressure levels. Bone mineral content and increased skeletal muscle mass can increase body weight, but not blood pressure. The higher the percentage of body fat, the stronger the relationship between body weight and blood pressure. Therefore, in order to reduce blood pressure levels, it is most critical to reduce body fat content. The characteristics of body fat distribution are also important factors affecting blood pressure. Increased visceral fat volume (i.e., centripetal obesity) is more likely to lead to increased blood pressure than increased subcutaneous fat volume. Waist-to-hip ratio is a simple indicator of fat distribution characteristics, with higher waist-to-hip ratios associated with a greater risk of hypertension and cardiac and stroke events. The safest and most effective way to reduce weight is to combine dietary control with increased physical activity. Controlling dietary intake without increasing physical activity or increasing physical activity without controlling calorie intake are not effective in reducing weight. More importantly, maintaining an ideal body weight not only helps to maintain healthy blood pressure, but also reduces the incidence of dyslipidemia, dysglycemia, and other cardiovascular risk factors, as well as the risk of cardiovascular events.