The height of 1~6 months is 2.5xmonths+50cm, 7~12 months is 1.5x(months-6)+65cm, 2~6 years old is agex7+75cm, 7~12 years old is agex6+80cm, but the above heights are estimates, which are often of reference significance only, and have less significance in guiding the actual clinical diagnosis and treatment work. Newborns are born with a body length of about 50cm, and at the age of 1 year, they can reach a length of 75cm, and after the age of 2 years, their height increases by 6-7cm per year. Children should undergo regular physical examinations, and record their growth and development, including height and weight, in order to clearly define children’s growth and development, and should be compared with the normal growth and development of the standard curve. If abnormalities are found, early intervention under the guidance of a doctor is needed, and if necessary, a complete MRI of the head, endocrine-related tests such as growth hormone, etc., need to be alert to whether the dwarfism, growth hormone deficiency and other diseases. Children should exercise appropriately, ensure adequate sleep, pay attention to reasonable diet, balanced nutrition can help the baby’s physical development.