Traditional metaphor researches mainly focus on form study and have probed into the essence of metaphor to a certain extent.However,they fail to make satisfactory explanations on the cause and working mechanism of metaphor.Fauconnier ’s Conceptual Integration Theory(CIT)can make a thorough and elaborate explanation to metaphor and reconstruct the basic pattern of metaphor production from the perspective of cognitive psychology. Traditional metaphor researches mainly focus on form study and have probed into the essence of metaphor to a certain extent. However, they fail to make wise explanations on the cause and working mechanism of metaphor. Fauconnier’s Conceptual Integration Theory (CIT) can make a thorough and elaborate explanation to metaphor and reconstruct the basic pattern of metaphor production from the perspective of cognitive psychology.