In China，the concept of intangible cultural heritage has gradually stepped into daily life and modern market from the research field of scholars. Especially at the turn of the “13^th Five-year Plan” and the “14^th Five-year Plan” when the whole society and culture were undergoing drastic changes，“intangible cultural heritage”，as the core gene of China’s excellent traditional culture，plays a unique role in the grand narrative of national destiny，culture，economy and society，such as epidemic disaster，poverty alleviation，rural revitalization，cultural and tourism integration and so on. Intangible dietary cultural heritage，as an important part of the intangible cultural heritage，although it shows its function and value in the torrent of the times，there are more struggles and confusion in the process of “becoming an intangible cultural heritage” and “why is an intangible cultural heritage”. Fortunately，the diet items in the fifth batch of national intangible cultural heritage list at the beginning of 2021 let us see possible new changes in the protection and inheritance of intangible dietary heritage. Under this opportunity，this paper comprehensively examines the diet items in the fifth batch of national intangible cultural heritage list. Taking the declaration of intangible cultural heritage and list items as the start of observation，this paper shows the changes and characteristics of national intangible dietary cultural heritage items from the diachronic perspective，analyzes the new and old trend of Chinese intangible dietary cultural heritage in terms of cognitive concept，protection idea and inheritance mode. In addition，combined with the current context of video-oriented society and modern narration，this paper proposes that the protection and inheritance of intangible cultural dietary heritage needs to carefully deal with the relationship between popularity and accuracy of expression，the relationship with sustainable development，and the relationship between communication and inheritance in the future.