Precocious puberty is a type of disease characterized by the early appearance of sexual characteristics due to multiple etiologies. Dietary factors may be one of the causes or factors contributing to the disease, as improper diet may cause excessive intake of estrogen or promote the secretion of estrogen in the body. Therefore, a rational diet or safe diet should be taken seriously in the prevention and treatment of sex hormones in girls. In general, a reasonable diet or safe diet includes the following aspects: 1. Avoid foods that can be used as medicine, including cordyceps, ginseng, royal jelly, dried cinnamon, dried lychee, astragalus, sage, and so on. Especially the Guangdong people, like to medicinal food soup. Chinese medicine points out that the consumption of too much tonic type of medicine, will change the normal endocrine environment of children, resulting in imbalance in physical and mental development. 2, avoid poultry, especially poultry neck. The majority of poultry sold on the market today are fed with fast-growing agent feed, thus, eating duck neck, goose neck, it becomes a high-risk factor for “precocious maturity”. 3, should not eat a lot of estrogen content of animal food, such as seeds shrimp, old hen and cream, etc.. 4, avoid anti-seasonal vegetables and fruits, winter strawberries, grapes, watermelon, tomatoes, etc.. Pears, apples, oranges and peaches, which are available early in late spring, are almost always in-season or ripen early with the help of “growth promoters” and must be avoided for children under 10 years old. 5, avoid fried foods, especially fried chicken, French fries and potato chips, excessive calories will be transformed into excess fat in children’s bodies, leading to endocrine disruption, leading to precocious puberty, is also one of the causes of “precocious puberty”, patronizing foreign fast food more than twice a week, and often eat fried puffed food for children. The possibility of “precocious puberty” is 2.5 times that of ordinary children. 6.Do not drink adult functional drinks. 7. Buy safe food or green food from reputable places (such as large supermarket chains) as much as possible. 8. Keep estrogen-containing drugs, such as birth control pills, in a safe place to prevent them from being taken by mistake.