Of these two languages, one is usually the mother tongue or the mother tongue, and the other is usually an acquired second or foreign language. In recent years, preschool bilingual education has become the most promising project in the field of education. Pre-school "bilingual education" is the best time for children to learn a foreign language before the age of 3, whether it is Chinese as their mother tongue or English as their mother tongue. They don't have the shyness of older children. They like to talk, sing and imitate. It is of great benefit to children's language development to expose them to English and express their ideas in both English and Chinese. Children's bilingual learning is an active intellectual activity, which undoubtedly promotes children's language and cognitive development. On the one hand, children receive pre-school "bilingual" education, showing them another set of language symbol system completely different from their mother tongue. Children are naturally curious and are particularly interested in languages different from their mother tongue. Driven by curiosity, they will learn foreign languages more enthusiastically, which can promote children's understanding of language diversity, enrich children's multilingual experience and increase the total number of children mastering languages. On the other hand, through bilingual learning, children can sensitively feel the differences between the two languages. As a direct result, children begin to regard language as a special system among the many systems they already have in their minds, thus improving their language operation ability and communication ability and promoting the improvement of divergent children's thinking ability. In children's English learning, it is a natural acquisition close to reality. Teachers combine learning English with rap performance by designing various educational activities, and the classroom is full of childish laughter. Learning English also permeates daily life, and drinking water during recess is answered in English; Integrate English learning into children's reading, and borrow English children's books from home every week; Learning English extends to the family environment, and the original cartoon DVD is played every day when I go home. Parents can do their own things, and screen English naturally attracts children. Let children learn oral English actively and happily in a relaxed and natural atmosphere, form a preliminary sense of language, stimulate children's interest and curiosity in learning, and lay a good foundation for children to enter primary and junior high schools. Bilingual education is a very popular early language education form in recent years. At best, its teaching mode and concept should be said to be a newborn in English education in China. First of all, it was introduced by some foreign joint venture or sole proprietorship schools and private schools in China. At the beginning, bilingual teaching was an expedient measure for some schools, especially some kindergartens and primary and secondary schools, to attract students and improve the efficiency of running schools. In the eyes of many educators at that time, "bilingual teaching" was not synonymous with "strengthening foreign languages" or "strengthening Chinese" and "English". On the other hand, in the context of China's birth policy, many families are only children, which can be said to be "trying their best" to raise children. As long as it is beneficial to children's growth, parents can afford it as much as possible and create a good learning environment for their children. If bilingual teaching is in the ascendant at this time, now it is in full swing, vigorous and a spark can start a prairie fire. Bilingual teaching has become a beautiful landscape in China's foreign language teaching reform. Choosing pre-school bilingual education to invest will be a promising industry.