Abstract: Yujiaxiaobu site was discovered in July, 1996, which located at 1500m to the south of Shenquanbu village and 1000m to the northwest of Yujiaxiaobu village, Yanggao County, Shanxi Province.
A total of 572 pieces typical microlithic stone artifacts were found from a 2㎡area in the bottom of the Late Pleistocene loess. The stone artifacts include cores, flakes , micro-cores, micro-blades, implements and debris. The implements are all scrapers. Raw materials are mainly silicalite and volcanic. A special technology of wedge-shaped microcore is known from here. The study of systemic refitting and comparing shows that it’s an undisturbed site.
Comparing the stone artifacts and cultural character with other Late Pleistocene sites in Nihewan Basin, Yujiaxiaobu site can be attributed to the Upper Paleolithic.

Key words: Microlithic artifacts; Systemic refitting; End of the Upper Paleolithic; Yujiaxiaobu site