In 2004, some stone age localities were found when a fieldwork was done by shaanxi provincial institute of archaeology in Ngari district western Tibet area. This research will focus on two of these localities: Ruoregou and Maiduodebu. It will investigate, classify and describe the lithic artifacts discovered in these two sites. This stone artifacts includes microblade cores, microblades, delicately retouched scrapers, and points. The discovery of these microlithic materials is of great significance for deeply understanding and studying the microlithic industry in Tibet.