Preschool children's psychology refers to the science that studies the law of children's psychological development from birth to preschool. Preschool children's developmental psychology is an important basic theoretical course for preschool education majors, and it is also a highly practical science. Expanding teaching materials is not only a basic course for learners to enter the field of preschool education, but also has a certain guiding role for practitioners, which can help preschool teachers to guide children's psychological development according to objective laws, avoid blindness in work and improve the effectiveness of education.

Psychological significance of preschool children's development;

1. Preschool developmental psychology is a basic subject related to children's psychological development. It not only introduces the path of children's psychological development, but also introduces the research situation in this field. Through this subject, we can have a comprehensive and systematic understanding of children's psychology and form a corresponding context.

2, the practical application of this subject is also very strong, there are many related experiments and games, which are very interesting and can better promote the relationship between guardians or direct caregivers and children.

3. Through it, we can understand the psychological state and phenomena of children at various stages after birth, as well as the psychological reaction of children when they are about to encounter most events in childhood. It can better promote children's early psychological development, strive to establish a healthy psychology in early childhood, and try to ensure that children have good values, outlook on life and world outlook in their future growth and development.

4. The contents of each chapter are organized with the basic knowledge and theory of preschool children's psychological development as the main line, striving to fully present the laws and characteristics of preschool children's psychological development and lay a solid theoretical foundation for forming a correct view of children and education.