词汇教学在大学英语教学中非常重要,如何帮助学生有效地识记、理解并运用词汇,这是一个值得探讨的问题。在建构主义学习理论的指导下,采用“自上而下”模式,鼓励学生积极主动构建词汇,将词汇学习和以前的经历、经验相结合,提高了词汇的学习效率。 Vocabulary teaching in college English teaching is very important, how to help students effectively identify, understand and use vocabulary, which is a question worth exploring. Under the guidance of constructivism learning theory, the “top-down” mode is adopted to encourage students to take the initiative to construct vocabulary. The combination of vocabulary learning and previous experience and experience improves the learning efficiency of vocabulary.