双语环境对儿童早期语言发展的影响

Facing the trend and challenges of globalization, bilingual（multilingual） environment has become the new norm of modern societies in the world. The trend also affects the change of our understanding, attitude and family language policies. Nevertheless, many adopt a negative view and believe that children growing up bilingually are slower in linguistic development than their monolingual peers. The paper reviews the research results of children's development of phonology, vocabulary and grammar in international journals in the past two decades, and deepen the reader's understanding of the impact of bilingual environment and bilingualism on child language development. Monolingual and bilingual language developmental trajectories are compared through empirical findings. Furthermore, main factors influencing early childhood bilingual development are discussed. Finally, summarizing from previous research, an interactive model is proposed. The paper furthers our understanding of impacts of early bilingualism with strong implications for family language policy in a monolingual setting.