Language is the most important tool for human beings with the outside world. In order to improve the efficiency of com?munication, people need to maximize the efficiency of language processing to ensure the smooth production and understanding of the meaning, although it is a subtle and complex process in human communication. As Dr. Widdowson proposed that language knowledge is largely chunk knowledge in the 1980's. The process of language output is the process of copying prefabricated Chunks knowledge and then transferring it to language output. Based on data collected before , this paper intends to study the domi?nant reproduction and implicit output of the English language from the perspective of prefabricated chunks, to play a guiding role in optimizing the output ability of EFL learners.