In the context of the rapid development of digitalization, the protection and inheritance of intangible cultural heritage is facing new opportunities and challenges. This paper takes Lanzhou Taiping Drum as an example, analyzes its cultural characteristics and current protection status, and discusses the innovative application of digital technology in the protection of intangible cultural heritage. Combined with high-definition imaging, 3D modeling, big data analysis and other technical means, this paper puts forward a practical path of digital recording, intelligent assistance and cultural ecological reconstruction. Research shows that digital technology can significantly improve the preservation, dissemination and experience of intangible cultural heritage, and promote the development of intangible cultural heritage from local culture to global dissemination. The research of this paper provides theoretical reference and technical support for intangible cultural heritage protection, aiming at promoting the sustainable development of traditional culture in the digital age.