Breastfeeding women should quit smoking and alcohol, if smoking for ten months it is recommended that breastfeeding should be avoided, breastfeeding mothers can not smoke, not only jeopardize their own health, but also will jeopardize the health of the baby. Cigarettes contain a large amount of nicotine, breastfeeding mothers smoking, a large number of nicotine will enter the maternal blood circulation, breastfeeding nicotine with milk into the baby’s body, nicotine mainly violates two systems, one is the nervous system, there is also a respiratory system, if the harm to the nervous system, babies will be irritable and restless mental state; if the harm to the respiratory system babies will cough and other symptoms, and in severe cases, pneumonia and other diseases. If the respiratory system is jeopardized, the infant will develop cough and other symptoms, and in severe cases, diseases such as pneumonia will also occur. In order to the health of the baby, it is recommended that the mother quit smoking, alcohol, to avoid the baby inhaling second-hand smoke, at this time the baby should be fed some fresh milk, add nutritious complementary food, is conducive to the physical and mental health of infants.