本文通过对甘肃杨上旧石器时代遗址出土石核与石片的原料、形态和类型的分析，探讨了石制品所体现的古人类的剥片技术及其特点，并从原料适应与文化传承的角度探讨了其技术策略产生的原因。杨上遗址石制品原料以脉石英为主，打片采用锤击法；包括普通石核和盘状石核两种剥片模式。由于脉石英原料易碎且破裂方式较难预判，导致剥片的掌控难度大，故而石核多呈现出台面选择的机会性与不确定性，缺少对于台面的修整以及剥片面的固定深入开发。在石片毛坯加工修整难度较大的情况下，古人可能更倾向于生产大量的石片，并从中选取形态角度合适的边刃直接使用。石核、石片的类型组合以及原料的构成比例从早到晚无明显变化，体现了陇西黄土高原旧石器时代早期文化传承的稳定性。

The Yangshang site (220-140 kaBP) is a late Early Paleolithic locale in Gansu Province. A total of 1696 lithic artifacts and 337 faunal remains were recovered during 2013 excavations. This paper summarizes the lithic reduction technology by analyzing raw materials, morphology and technical attributes of cores and flakes unearthed from the site. The cultural and adaptive implications of the lithic reduction strategies are further investigated. The results show that core reduction is characterized by hard-hammer percussion including platform-migrating and discoid core exploitation methods. The combination of core and flake types and composition of raw materials did not change significantly throughout the site’s occupation, which indicates stability of Early Paleolithic cultural transmission on the Longxi Loess Plateau. The Yangshang lithic assemblage is dominated by vein quartz. This material’s macrocrystalline and developed-inner flaw characters had significant impact on core reduction and flake morphology as the fragility and unpredictability of this material make it difficult to control core reduction process. As a result, core exploitation at Yangshang was a fairly opportunistic, migrating, platform strategy rather than focus on single platform preparation. Due to low workability of vein quartz for retouching and tool maintenance, retouch was only employed occasionally. Yangshang’s inhabitants may have preferred to produce a large quantity of flakes from which to select an edge with the appropriate form and angle for direct use.