Vocabulary learning is an indispensable part of English learning. In recent years, various Foreign Journal Reading Apps have sprung up and become prevalent in China. Accordingly, it has become a choice for many people to expand their vocabulary by learning foreign journals. Based on intensive reading of foreign journals, this paper focuses on the effect of audio auxiliary input mode on Incidental Vocabulary Acquisition of college students. Research shows: compared with single visual input, this input model is more helpful for the participants to acquire vocabulary knowledge in spelling, meaning and application, and improve the efficiency of incidental vocabulary acquisition.