The traditional institution of Keperwatinan Mergo Buay Subing is a forum for the people of Kampung Terbanggi Besar to discuss and resolve issues, maintain the existence of culture and preserve local cultural values, plan goals to be achieved by the culture of the indigenous people of Kampung Terbanggi Besar in the future. Keperwatinan Mergo Buay Subing has been established since the 1600s, but over time, the role of Keperwatinan Mergo Buay Subing has experienced ups and downs, especially in this era of globalization. The purpose of this study is to determine the role of Keperwatinan Mergo Buay Subing in preserving the Lampung Pepadun tradition as an effort to face the challenges of global culture. This study uses qualitative research methods and data collection techniques, namely interviews, observation and documentation, as well as data analysis, namely time extension and data triangulation can provide accurate information. The subjects in this study were Traditional Figures and Community Figures in Kampung Terbanggi Besar. The results of the Mergo Buay Subing Terbanggi Balak Community Care study still play a role in preserving the Lampung Pepadun tradition, especially in Terbanggi Besar Village, but in its implementation, the Community Care only provides examples to the community in terms of behavior, language, and how to dress in everyday life as role models that are expected to be emulated by the indigenous community. The Community Care applies the values of the core pesenggiri in the efforts to preserve Lampung customs, which in this pesenggiri piil includes bejuluk beadek, nemui nyimah, ngejuk ngakuk nengah nyappur, and sakai sambayan. The obstacles faced in this preservation effort are cost factors, public awareness, and participation of the village government and the younger generation.