Code-switching (CS), as a phenomenon of language contact, has aroused great attention from various fields. Researchers do studies on code-switching from different perspectives like the sociolinguistic, grammatical, psycholinguistic perspectives and conversation analysis perspective, etc. This thesis based on Verschueren’s Adaptation Theory and Yu Guodong’s Adaption Model studies exact ads in order to summarize the reasons and features of EnglishChinese code-switching. Through analysis, it can be found that CS as a pragmatic strategy in advertising discourse can provide microscopic view of language inner structure for the purpose of adaptation to linguistic reality, social rules and wishes of audience. Therefore, this adaption can help advertiser to better carry out publicity and code-switching can truly become an effective advertising strategy.