The reserve covering an area of 2,500 square kilometres was jointly launched by the China Biodiversity Conservation and Green Development Foundation and the regional government of Tibet.
Wang Wenyong, head of the legal affairs department with the foundation, said that the launch of the preserve is only the first step in protecting the area from light pollution.
"If we do not take action now to preserve the area, we risk losing one of the best astronomical sites on Earth," Wang, was quoted as saying by the state-run China Daily.
However, the recent increase in urbanisation has led to the risk of more light pollution.