It is well known that brain development begins in the fetal period. Brain cells generally begin to form after the mother has been pregnant for three weeks, after which the brain nerve cells proliferate rapidly and in large numbers, and the neuroglia, which provide nourishment to the nerve cells, begin to appear. The said cells are the material basis for a person’s intellectual development, so in order for the baby to be smart, the prerequisite is to take good care of the pregnant mother and prepare rich nutrition for her, as well as avoiding exposure to various potentially harmful substances in the living environment, and more importantly, to ensure that the pregnant mother is in a good mood. According to research, during pregnancy, pregnant women have been frightened or too much anger, and even excessive work pressure may make the fetus brain development is not normal, which need to cause the mother-to-be pay close attention to. 1, to provide a safe and loving environment for the child Neuropsychologist Dr. Paul Marklin believes that the brain of a newborn baby consists of three structurally distinct brain regions: at the bottom of the brain is the reptilian brain, which governs some of the instinctive behaviors of the human being, and if this low-level region is threatened, it can shut down the brain’s high-level region of thinking activities. Therefore, when parents develop their children’s intelligence, they must provide a safe and loving environment for their children, so that they can live in a carefree environment; in the middle of the brain is the breastfeeding brain, which mainly masters human emotions and behavioral dynamics, and what parents have to do is to communicate with their children emotionally within two years after their birth, often give encouragement and care for their children, pay great attention to their children’s movements and requirements, answer their children’s questions positively and carefully, and give their children a good response to their questions. The parents should actively and conscientiously answer all kinds of strange and bizarre questions raised by the child, and satisfy the baby’s desire to explore and curiosity as much as possible. 2, rich and appropriate external stimulation in the top layer of the brain is the cerebral cortex, including the control of the baby’s visual, tactile, auditory and language skills, motor awareness, memory judgment ability of the occipital lobe, parietal lobe, temporal lobe, frontal lobe, its function is to think, communication, observation and creation, the baby’s brain development and growth rely on the stimulation of the above five senses. Therefore, babies should be given rich visual, auditory, tactile, gustatory, olfactory, proprioceptive, motor stimulation and language information. Once a neurosurgeon experimented with rats and found an interesting result: rats in a content-rich external environment, the volume and weight of their cerebral cortex tissue, compared to those in the little exposure to the outside world of effective stimulation to the rats to be much heavier and much larger. It is essential that the child (infant) be given appropriate stimulation of the various sense organs, but this does not mean that the infant is constantly being stimulated all the time. When an infant shows over-excitement or irritability, it is an indication that he has received too much stimulation, and the functioning of the nerves in his brain to receive and transmit information can be disturbed, thus affecting the development of the child’s intelligence. There is an analogy that trying to force a child to accelerate his learning before his brain’s nervous system is fully developed is like racing a stretch limousine down a narrow path in the jungle; although you can drive the car, the result is that both the body and the path are destroyed. Therefore, the stimulation of your baby should be moderate and in accordance with his or her age, and should not be unduly stimulating.