Baby 100 days that is, from the day of birth as the first day of counting, counting to the 100th day, generally calculated according to the lunar calendar. The baby’s sensory nerve development tends to be mature when it is 100 days old, and it starts to be curious about new things. At this time, you can strengthen the communication with your baby and do more outdoor activities, but you need to pay attention to keep warm and avoid bright light stimulation. Baby 100 days diet to breastfeeding, milk powder feeding is the main, can also be mixed feeding, appropriate to add vitamin AD, can also add a small amount of fruit and vegetable juice. One hundred days old baby can already lift his head, but still can not turn over, you can strengthen the training. At this time need to pay attention to careful care to avoid accidents and injuries. Second, parents also need to keep the baby’s hands clean and hygienic to prevent bacteria from entering the mouth when eating hands. When the baby is 100 days old, parents should not blindly add supplementary food, nutrition or supplements on their own; they should pay more attention to the baby’s temperature, behavior, crying and mental state, etc. If there is any abnormality, they should go to the pediatrician in time.