The baby who has been breastfeeding can choose to mix and add when adding formula, or directly let the baby drink a small amount of formula, pay attention to from less to more, from thin to thick. 1. mixed add: mixed add refers to breast milk and formula alternating feeding, you can first give the baby breast milk, breast milk and then feed the baby a small amount of formula, for its nutritional supplements, for breast milk insufficient mothers can often choose this method. 2. Simply add: when weaning the baby, you can feed 1~2 times breast milk after feeding 1 time of formula, and then gradually increase the number of times of formula feeding. It should be noted that the first from a small amount of formula feeding, to observe the baby has no adverse reaction, to be gradually adapted to the baby can slowly increase the amount of milk powder. In this process, you should always pay attention to observe the baby’s situation, if the baby has decreased appetite, diarrhea, etc., you can also try to change the type of milk powder, if necessary, need to consult a doctor for examination and treatment.