Definition It refers to the comprehensive development of the early developmental potential of children’s physical, mental and social abilities from fetal period to preschool, which is an important part of children’s health and moreover the foundation of a person’s lifelong health and ability. The importance of early childhood development 1. Early childhood, the initial and most important stage of the human life cycle, lays the foundation for a person’s entire life. Its impact continues into adulthood and even throughout life, and support for early childhood development will yield the best results. 2. Fetuses and infants are still at the beginning of individual life, the early stages of development, immature in every aspect, the most vulnerable and fragile. Therefore, they need special care, protection and support the most. 3. Early childhood development, with its obvious uncertainty and plasticity, can be affected by both positive and negative influences in the environment and society, and these influences can be effectively intervened. Therefore, it is possible to implement more effective safeguards and promotion of early childhood development based on scientific evidence. Early childhood development involves a multidisciplinary and multisectoral approach that focuses on five aspects of early childhood: health, nutrition, nurturing, education, and protection. The goal is to achieve the full realization of children’s rights, to give each child the best start in life, and to allow each child to develop to his or her full potential.