(1) Harmony and unity of children's physical and mental development. The unity of children's physical and mental development requires that the work must pay attention to the integrity and systematicness of education, coordinate the influence of education in all aspects, and implement a harmonious and comprehensive education. (2) The continuity and stages of children's physical and mental development. The continuity and stages of children's physical and mental development require educators to carry out educational work step by step according to the age characteristics of children's physical and mental development at different ages. (3) the stability and variability of development. The stages and sequence of children's physical and mental development and the process and speed of changes in each stage are basically the same, but they are variable. It shows that children of the same age have different development levels and are feasible at the same time. In addition, education should also pay attention to the rapid and healthy development of children's body and mind. (4) The development speed is unbalanced. The imbalance of children's physical and mental development requires educators to understand the mature period, seize the critical period, and take effective educational measures to promote the healthy development of children's physical and mental health. (5) Differences in development content and degree. The different laws of children's physical and mental development require educators to actually observe students, understand their different interests, hobbies, specialties and ability tendencies in physical and mental aspects, teach students in accordance with their aptitude, and carry out targeted education work.