The most critical period of baby’s brain development is the first three years after birth, which is often referred to as the 1000 days of life, is the most rapid period of human intellectual development, and is also a critical period for the development of many abilities. The brain develops fastest in the early stage of life. The brain weight of a newborn baby accounts for 8% of the birth weight, and the brain weight of a human being accounts for 4% of the body weight. In the first two years, brain development is the fastest, around the age of 3 years old baby brain has tended to mature, early life brain plasticity is the largest, which is important for early childhood intervention. For many years, there has been a misconception that a child’s brain is determined solely by the genetic inheritance of both parents. However, neuroscientists have found that a child’s brain development is critical between the ages of 0 and 3 years, and that acquired nurture and innate genetics should complement each other.