语言是人类核心交流工具，儿童语言习得是语言发展的关键。心理语言学专注于语言习得与处理研究，儿童语言研究则围绕其各维度展开。心理学与语言学的交叉融合，使心理语言学理论和方法在儿童语言领域广泛应用，助力教师理解语言发展机制、优化教育策略。本文将阐释心理语言学核心概念，分析儿童语言习得规律，探讨其在第二语言课堂教学中的理论与实践价值。

Language is a core tool of human communication, and child language acquisition is crucial for linguistic development. Psycholinguistics focuses on the study of language acquisition and processing, while research on child language explores its various dimensions. The integration of psychology and linguistics has led to the widespread application of psycholinguistic theories and methods in the field of child language studies, helping educators understand the mechanisms of language development and optimize teaching strategies. This paper will explain key concepts in psycholinguistics, analyze the patterns of child language acquisition, and discuss its theoretical and practical significance in second language classroom instruction.