The work of China's intangible culture heritage protection has achieved significant performance. Many of intangible culture heritages have been rescued, protected, inherited and utilized. How to effectively extend these heritages' cultural vitality? This needs humans to excavate its value and function. The protection and inheritance of intangible culture heritage combines with the construction of community culture, which is an effective way to extend the cultural vitality of intangible cultural heritage. On the perspective of the construction of community culture, the essay analyzes the cultural entertainment function, cultural participation function, cultural education function and cultural identity function of the national intangible cultural heritage -- Huizhou Mulian opera