Although it is difficult to prevent precocious puberty caused by certain hereditary factors or genetic mutations, hypothalamic-pituitary tumors, ovarian tumors in girls, testicular tumors in boys, and adrenal gland diseases, some other causes of precocious puberty, such as pseudo-precocious puberty, can still be prevented. The way to prevent 1, some exogenous precocious sexual maturity is completely preventable. Clinically, we often encounter children with breast development and pubic hair several months after taking placenta supplements containing estrogen or taking birth control pills by mistake. It has been found that chicken embryonic supplements cause precocious puberty in children mainly because of the estradiol and peptide hormones contained in them. In animal experiments with ginseng royal jelly, it was found that immature female rats who took royal jelly-based supplements for several times showed precocious puberty with a significantly enlarged uterus and increased vaginal secretions. Therefore, for children who are healthy and have a balanced diet, there is no need to add additional tonic products. For children who are usually weak and sickly, anorexic, or have night sweats, it is best to choose appropriate supplements under the guidance of a doctor to avoid unnecessary side effects. Pregnant women and lactating mothers should not use supplements and skin care products containing sex hormones, and children should avoid using skin care products containing sex hormones. For young parents who take birth control pills, they should place the pills out of reach of their children. 2, excess nutrition, too much body fat is prone to promote precocious sexual maturity. A high protein diet will cause an increase in deoxyribonucleic acid replication and protein synthesis; obese children are over-nourished and have more adipose tissue in their bodies, as fat cells can synthesize leptin, and when leptin in the blood rises to a certain level, it will lead to early pubertal development in children. Therefore, should be appropriate to control the diet, the more obese children in the control of fat and sugar intake at the same time, to ensure the intake of protein and vitamins, can eat more seafood, milk, fresh vegetables and fruits, etc.. 3, cultural entertainment: children should not watch love films or novels, and do not go to see those yellow books or films, otherwise it can promote the early sexual development of children. 4, environmental factors: environmental pollution, the widespread use of cosmetics containing chemical substances, as well as artificial feeding or breeding of animals and plants used in feed, fertilizers, etc., which “environmental hormones”, may cause human reproductive function disorders, resulting in premature sexual maturity or low sexual function of children. These problems should have attracted great attention and actively take corresponding countermeasures. In addition, ultraviolet light has the potential to promote sexual development, therefore, excessive exposure of children to ultraviolet light should be avoided in summer. As seen above, comprehensive measures should be taken to prevent precocious puberty in children, first of all, we should raise the awareness of parents, family and society about the importance of preventing precocious puberty in children. We should pay attention to balanced nutrition, not to be partial or over-eating, not to abuse various tonic products for children, and avoid contact with pornographic books and movies.