There are many causes of precocious puberty in children, which can be referred to the following situations: i. Precocious puberty of most children’s physical factors, caused by a decrease in the hypothalamus’ sensitivity to the negative feedback of sex hormones, is relatively common in girls. Secondary precocious puberty can be caused by special or even very serious diseases, such as tumors of the central nervous system, occupational diseases, central nervous system infections, and some trauma. Third, congenital abnormalities in development or gonadal tumors may also lead to precocious puberty. Fourth, special diseases, such as congenital adrenal cortical hyperplasia. Five, life is relatively concerned about eating food containing more estrogen, may also lead to precocious sexual maturity, in life can focus on avoiding.