As the essence of English idioms, the considerable amount, rich in content, widely application is an important part of English vocabulary. English idioms are often formed in the people’s mind. It is very polite and subtle. Therefore, people can not only keep in leaning idioms lively but also imitating application. It is also need to understand the deep structure of idioms. Especially in English learning in the language of the metaphor meaning. In order to cultivate and improve the creative use of English idioms ability. Idioms are an important part of the English language. It is also the essence in English. Each of an idiom seems to have their own specific forms. The historical origin, cultural connotation and the use of taboo. This requires the user to grasp it’s significance. Idioms are the cream of language with rich culture connotation in which colloquial metaphors often exist. With the development of cognitive linguistics, the study of idioms converts from the traditional figurative function to cognitive function. The conceptual metaphor presented by lake off is the important part of language should be used to explain the inner structure of the language. Through the analysis of related theories of cognitive linguistics, the cognitive mechanism of metaphor in English idioms is illustrated. It turns out that the cognitive analysis of metaphor in idioms not only accords with the law of language development but also helps to understand and apply the idioms correctly. Metaphor in English Idioms 英语习语中的隐喻研究(2):http://www.751com.cn/yingyu/lunwen_10279.html