The standard height of an 8-week-old girl is 128.5cm and her weight is 25.25kg. To measure whether a girl’s height is standard, we need to do an orthopantomogram of the left wrist joint and a bone age test for children, which can truly measure whether the child’s height is within the normal range. If the height of an 8-week-old girl is between 124.9-132.1 cm, it belongs to the upper and lower one standard deviation and is approximately normal. If the height of an 8-week-old girl is less than 120 cm, the clinical diagnosis of short stature is made and further examination is needed according to the actual symptoms of the child. In life, it is necessary to have a balanced and reasonable diet, ensure sufficient sleep, and ensure a certain amount of physical activity every day, mainly bouncing physical activity, which is conducive to growth, and pay attention to vitamin D supplementation and the supplementation of trace elements such as calcium, iron and zinc.