Precocious puberty in children is defined as early sexual maturation, which is the presentation of secondary sexual characteristics before the age of 8 years in girls and 9 years in boys. The clinical features of central precocious puberty are the early onset of development of sexual signs similar to the normal pubertal developmental sequence, and some symptoms may develop after a period of pause in sexual development to a certain extent. Excessive height and weight gain and accelerated skeletal maturation may occur. Children with precocious puberty are initially taller than their peers, but are prone to premature epiphyseal fusion and short stature in adulthood, and some may even have psychosocial problems. The process of sexual development in peripheral precocious puberty is very different from the above pattern. Boys with precocious puberty should pay attention to the size of the testicles, testicular volume increase suggests central precocious puberty; if the testicles are not enlarged, but the masculinization of the progressive development, it suggests peripheral precocious puberty. Children with precocious puberty due to intracranial tumors often only have precocious puberty in the early stage of the disease, and in the later stage, vomiting, headache, dizziness, blurred vision and visual field defects may appear. Children with symptoms of precocious puberty should go to regular hospitals for timely treatment to inhibit or slow down the process of development.