A few years ago, precocious puberty was just a medical term, but nowadays it has quietly approached children, and the incidence is on the rise. In recent years, precocious puberty in children has become a more common juvenile endocrine disorder. Girls begin to develop breasts before the age of 8 weeks, and menstruation appears before the age of 10 weeks; boys appear before the age of 9 years penis, testicular enlargement, rapid increase in stature, can be called precocious puberty. Some of the causes of precocious puberty are caused by over-nutrition; some are that the child’s mother used a kind of breast enlargement cream, and when breastfeeding, the breast enlargement cream containing a large amount of estrogen was partially absorbed by the child; some are that the child actually ate the mother’s sugar-coated contraceptive pills as sugar, which led to precocious puberty. In addition to the above-mentioned reasons, there are also the following: residual hormones in plants and animals, most of the anti-seasonal vegetables and fruits are hormone-promoted, and eating such fruits is not good for children’s body; environmental hormones; blind tonic and intake of health products; premature psychological stimulation, with the popularity of television and video discs, some children can be exposed to some behavioral images beyond their psychological age from films and videos at an early age. The main harm of precocious puberty is that it affects the normal development of children. Children’s puberty and growth period are early, the epiphysis closes early, the bone growth is terminated early, the development starts with a higher figure than children of the same age, but the height of adults is often not ideal. At the same time, precocious puberty also affects the child’s personality and psychology. The child may have low self-esteem, fear and anxiety because she is physically different from her peers. Girls who have premature menstruation are often very nervous, which affects their normal life and studies. There are also some children who are not enough to be diagnosed with precocious puberty, but there is early sexual development, which also affects the child to a certain extent. These children should also intervene in time to delay sexual development and promote height growth.