The precautions for three-month-old babies are explained in three aspects: feeding, vaccination and early education. 1. Feeding: Milk is the main food for three-month-old babies, and breast milk is the best food, so breastfeeding should be done as much as possible. If there is less breast milk, you can also use formula milk for feeding. Attention to feeding at the same time need to pay attention to the child’s development, such as weight and length, three-month-old baby’s weight can reach twice the birth. 2. Vaccination: the baby’s three-month vaccine is usually the second shot of polio vaccine and the first shot of DPT vaccine, for polio vaccine, if it is an oral sugar pill half an hour before and after vaccination, prohibited to give the child food and water. For the timing of vaccination, to choose to vaccinate the child in good health, if the baby has a cold, cough, fever and rash and any other symptoms of the disease, it is not recommended to vaccinate, should wait until the disease is fully recovered to make up the vaccine. 3. Early education: such as touch and verbal communication, to the three-month-old baby can be early education, adhere to the morning and evening every day to the baby to do a touch, often and the baby language communication, can promote the development of the baby’s intelligence. Therefore, three-month-old babies should be given attention from the above aspects, can promote the healthy growth of the baby.