如何扩大词汇量一直以来对于大学英语教学的“教”和“学”双方来说都是极其重要的事情。然而,实际情况往往是学生耗时较多却收效不大,教师课时有限又不可能把大量时间投入在词汇教学上,扩大词汇量成为令教学双方头疼的事情。本文以词汇附带习得理论为基础,分析影响词汇习得的主客观因素,阐明附带习得理论对于大学英语词汇教学的启示作用,探索学生扩大词汇量的有效方法。 How to expand vocabulary has always been an extremely important issue for both English teaching and learning in college English teaching. However, the actual situation is often the students spend more time but with little effect, limited time teachers can not spend a lot of time in vocabulary teaching, to expand the vocabulary becomes a headache for both teaching things. Based on the lexical attendant acquisition theory, this article analyzes the subjective and objective factors that affect the acquisition of vocabulary, clarifies the enlightenment function of incidental acquisition on college English vocabulary teaching, and explores the effective ways for students to expand their vocabulary.