The Xiaolongtoushan site (44°25'36.2" N, 129°10'43.1" E) is located on the right bank of the Hailang River in Hailin, Heilongjiang Province. It was discovered in 2012 and excavated in 2014. From the test pit covering an area of 10 m², a total of 82 stone artifacts was discovered. Basalt dominates the lithic raw material, followed by obsidian, tuff, andesite and dacite, etc. The lithic debitage features blade technology and microblade technology. The tool types include burin, point, bifacial point and large-sized axe. A few specimens can be conjoined and the stone artifacts are not abraded and weathered, indicating that the site was buried in situ. AMS ¹⁴C dating method was applied and suggested an age of 13185±40 BP for the cultural layer of the site, corresponding to the warming phase after the Last Glacial Maximum.