Zhang Zonglin devoted his life to preschool education. He believes that preschool education is the foundation of all education and training talents, but it is also the link that Chinese people pay the least attention to. At the same time, he was saddened to see that this field was dominated by foreigners, so he became the first male college student to be a kindergarten teacher in the history of preschool education in China, regardless of social contempt and family obstruction. In China in the 1920s, there were many problems in preschool education. On the one hand, Zhang Zonglin went to various places to investigate and study. On the other hand, he assisted Chen Heqin in his research in experimental bases such as Gulou Kindergarten.

65438-0927 was appointed as the inspector of preschool education of Nanjing Education Bureau. During this period, influenced by the revolution, he thought that preschool education at that time only served the rich, so he began to engage in the research of naive education in rural areas. Zhang Zonglin's simple education thought is an important aspect of his ideological system. He has made great contributions to the discussion of the nature of kindergarten curriculum and the research on the content and compilation of kindergarten curriculum.