Brokpas are a pastoral community primarily engaged in rearing of yak (Bos Grunniens), found mostly in the Himalayan Alpine regions. They live a nomadic life, migrating to higher altitude during summer and returning back to lower altitude in mountainous region in winter along with the yak herds. The Monpas are very much dependent on Brokpas (Yak Herders) for the supply of Milk products such as Churpi (local cheese), Ghee (local butter) which they consume on daily basis. However, the pastoral livelihood of brokpa community is fading away as well as there is a shift in the occupation of Brokpas from their traditional herding activities. Therefore the study is centered towards understanding the Traditional way of life of Brokpas of Arunachal Pradesh. It also aims to know the cause for shift in occupations by the Brokpas and its affect on cultural life of Monpas. It also focuses on highlighting the affects of modernization in traditional Lifestyle of Brokpas. Focused group discussion has been conducted for collecting data from yak herders. A household survey with a structured schedule was conducted. The information collected through structured schedule has been supplemented by narration of elders, oral interviews and collection of products for deriving primary data. The study has found an intimate relationship and interdependency between Brokpas and Monpas. Due to modern education and better job opportunities, Brokpas are leaving behind their old mode of subsistence and has an immense effect on their traditional lifestyle.  Moreover, Intrusion of modernity has its own affect on Brokpas food habits, clothing, mode of transportation, etc. The modernization has both pros and cons but the influence its exerting on pastoral community is seem to be negative. However, it can be ameliorate if local community and government agencies work together to find an appropriate solution to this.

Keywords: Pastoralist, Yak Herders, Monpa Tribe, Tradition, Modernization.