The fastest growing period for children is infancy and adolescence. Infancy refers to the period from birth to less than one year of age, which is the fastest growing period in life. Therefore, we should promote breastfeeding, timely and reasonable addition of complementary foods, regular physical examinations, as well as immunization programs for vaccination. Adolescence is the second growth spurt in life, in addition to the acceleration of physical growth, the development of intelligence also leaps forward, during this period of time, the mood is variable and unstable, prone to various abnormal psychological diseases, so this stage of children should strengthen health education, nutrition guidance, sex education, health guidance, etc.