Metaphor,a pervasive language phenomenon,has been our focusing research for a long time.From rhetoricians to psychologists and linguists,we begin to realize how important metaphor is in our cognition and thought.Nearly every corner of the society is closely related to metaphor and we can use the theories of metaphor to explain many areas.The author tends to get some inspirations from the research of metaphor and seek for in what way can metaphor help improve college students’discourse comprehension.