The main raw materials of Zhangzi Yufang are lotus leaf, hawthorn, cassia seed and green tea. Food is wrapped by cassia gum and pectin macromolecules, which absorbs water and lubricates intestines. By stimulating intestinal mucosa, accelerate intestinal peristalsis and accelerate the discharge of energy substances; By reducing the activities of catabolic enzymes such as starch, fat and protein, and reducing the absorption and transformation of energy substances, the absorption and metabolism of energy substances can be effectively reduced, and the fat stock in the body can be consumed, so as to achieve the effect of slimming.