Abstract: Longmen grottoes are the essence of Beiwei dynasty and Tang dynasty, and the art treasures of an era of China.Longmen grottoes was taken as an example to analyze the authenticity of its political,economic and culture. The conclusions were that,to exhibit the world heritage authenticity under tourism context, the interpretation system must be built completely to improve the understanding of the authenticity of the world heritage,a variety of publicity methods must be used to improve the level of appreciation of visitors,and the consciousness of protecting must be aroused to keep sustainable use of the world heritage.