Following the tourism boom in China ’ ethnic minority areas , excessive “commer-cialization” and“performance”of ethnic culture in tourism development became more and more preva-lent .Some ethnic culture displayed in the tourist market showed traces of “being faked” or “being performed”, which caused the tourists to question or even reject its cultural authenticity .Under such a background , some local tourism businessmen or operators began to take “authenticity” as one of the key contents for the new round of ethnic tourism development , so as to change the tourists ’ unfavorable impressions regarding “faked” ethnic traditional cultures , and to rebuild the tourists ’ confidence in consumption of the tourist product . Zangmi ( the Mysterious Tibetans ) is a new Ti-betan cultural performance in Jiuzhaigou which is promoted for its “authenticity”.This article takes this performance as a case study to research the“reconstruction of authenticity” in the development of ethnic tourism .By doing so it reveals both the impacts and causes of this kind of “created authen-ticity”, and provides some relevant strategies to re-solve it.This will help to improve the quality of the tourists’ cultural experience , and also provide for the sustainable development of local tourism .