The ancient Tibetan Buddhist scriptures preserved in the Dunhuang Caves represent an important cultural legacy from Dunhuang during Tubo Period (786-848 AD). A study of the paper used for the Dunhuang Tibetan Buddhist scriptures during the Tubo period will broaden our understanding of the details of Dunhuang Buddhist scripture production during the Tubo period. The paper used in the extant Dunhuang Tibetan scriptures, mainly the Śatasāhasrikā Prajñāpāramitāsūtra and the Aparimitāyur-nāma Sūtra, largely follows papermaking techniques in Tang Dynasty, and was produced in three locations: Dunhuang, Hezhou and Tibet today. The bookbinding of Tibetan manuscripts was primarily in forms of pothī and scroll, with a high degree of form homogeneity, and there are noticeable differences in appearance and hierarchical order between manuscripts made in the same form and at different locations. The paper of manuscript is scrapped according to strict procedures, and scrapped paper would be reused very efficiently. If the papers were unable to be used for sutra copying, they were either converted to write other Buddhist sutras or texts, or returned to the scribes as Glegs tshas (wrapping paper).