Abstract: Contrary to the view of structuralism that all idioms are dead metaphors,cognitive linguists hold the view that idioms,as the products of our conceptual system,are in fact analyzable and very much alive metaphorically.The four motivations illustrated in this paper show that idioms are analyzable and decomposable,and the meanings of idioms can be deduced but not arbitrary.Although idioms take concepts as ontology,the forming and understanding of idiomatic meanings still have cultural backgrounds and cognitiv...