The language education of preschool children takes the language development and education of children aged 3-6 as the research object, that is, the training and education of children's early mastery of their mother tongue (acquisition of the first language), and further discusses the language education of preschool children.

Language is the voice that conveys information. It is the most important communication tool for human beings and the main expression of people's communication. People use language to preserve and transmit the achievements of human civilization. Language is one of the important characteristics of a nation.

Generally speaking, every nation has its own language. Chinese, French, Russian, Spanish, Arabic and English are the main languages in the world and the working languages of the United Nations.

Language is a very complicated structural system. Judging from its constituent elements, it includes phonetics, grammar and semantics. In addition, language, as a communication tool, has pragmatic problems of how to use it to communicate effectively, which are all restricted by certain rules. Children must master these basic rules step by step in order to acquire the ability to produce and understand their own language.

Therefore, language development is an extremely complicated process. However, all children with normal physiological development, even children with mental retardation, can successfully acquire the ability to listen and speak their mother tongue without any formal training within 4 ~ 5 years after birth. The speed of its development is unmatched by other complex psychological processes and psychological characteristics.