First of all, we need to clarify what the cause, the common causes are congenital or hereditary diseases, in addition, there is no improper feeding, nutritional discomfort and so on. For a clear cause, if there is congenital or other diseases, we should promptly treat the primary disease, adjust the gastrointestinal function, with the increase in nutritional intake of children, gradually can catch up with the growth of normal children. After excluding the above diseases, it may be related to nutritional intake. In fact, many babies with delayed weight development have the habit of picky eating, and parents will have difficulty in feeding them, and if they eat less for a long time, the baby’s weight will lag behind that of their peers. Trace elements, calcium deficiency and other nutrient deficiencies can lead to delayed weight development, pay attention to nutrition to keep up with the diet should be matched, eat more trace elements calcium content of high food. Milk, dairy products, beans, soy products, seafood, meat, poultry and eggs, vegetables, fruits, dried fruits are calcium-rich foods. Therefore, parents can regularly measure the weight of their babies, and then compare it with the standard development table. Once you find that your baby deviates from the normal development level, you should bring your baby to have a checkup in time.