With the emergence of emerging multimedia video, the development of mobile network technology and smart phones, more and more young people are addicted to it, and traditional culture is gradually lost or even disappeared. In order to better protect historical culture, this paper explores the use of AR technology to realize the protection of cultural resources. It first introduces the concept of AR technology, the application of AR technology in the protection of historical and cultural resources, and the idea of using AR technology to protect historical and cultural resources, then analyzes the difficulties and innovations of AR technology in the digital protection of historical and cultural resources, and finally draws a conclusion: AR technology plays a very important role in the protection and development of historical and cultural resources.