Six-month exclusively breastfed babies generally do not need to drink water, formula-fed babies can be calculated according to the weight, the amount of milk powder to drink water, the specific amount of water to drink there is no fixed value. Exclusive breastfeeding of the month baby generally do not need to drink additional water, breast milk 80 ~ 90% for water, so breast milk is the best choice for infants to replenish water, can meet all the body fluids and energy needs of the age group. However, if there are special circumstances such as diarrhea, fever, vomiting, etc., additional water can be drunk under the guidance of a physician. If breastfeeding is not possible due to insufficient breastfeeding or illness, formula can be used for artificial feeding, in which case water can be given in small portions between feedings. 6-month-old babies have a total fluid requirement of 150 ml/(kg-d), which includes the amount of breastfeeding and the amount of water they drink. Therefore, the amount of water drunk (ml)=150*weight (kg)-feeding amount (ml), which can be replenished in small amounts over a number of times. Parents are advised to keep an eye on their babies’ diet and seek prompt medical attention if there are any abnormalities. If the six-month-old baby has started to add complementary food, the specific amount of water consumption can be consulted with professional doctors.