王家堰遗址第1地点位于成都双流牧马山台地北部缓丘之上。遗址发掘出土石制品82件，包括石核、石片、断块和石器等，此外还有大量未经加工的完整砾石。石制品原料主要来自附近河滩砾石及牧马山组下部砂砾石层，以石英岩为主，附少量脉石英。石核剥片均采用硬锤法，主要为单台面石核，另有少量双台面石核。石片的尺寸变异较大，少量石片具有制作手斧等重型石器的潜力，石片台面以石皮为主。部分石片边缘可见明显的破损痕迹，可能为使用所致。石器以重型类为主，其中包括手斧和手镐等类似阿舍利技术风格的石器类型。初步光释光测年结果显示，王家堰遗址第1地点古人类活动的时间不晚于距今8.9万年。王家堰遗址第1地点的发现和发掘，拓展了成都平原地区早期人类活动的历史，为进一步了解和探索成都平原早期人类的生存策略及旧石器文化提供了重要材料。

Locality 1 at the Wangjiayan site is located in the northern part of the Mumatai undulating terrace in Shuangliu District, Chengdu City. In total, 82 stone artifacts were excavated from the site including cores, flakes, chunks and tools. In addition, a large quantity of unmodified cobbles were also unearthed. Raw materials were mainly collected from adjacent river gravels and lower cobble lays of the Mumashan Formation. Quartzite is the predominant type of raw material, accompanied by a small proportion of vein quartz. Freehand percussion was exclusively used for core reduction, with single-platform cores prevalent, plus a few double-platform cores. Flakes show a remarkable variation of size with some possessing the potential to make heavy-duty tools (e.g., handaxes) as a cortical platform is common for most of the flakes. Damage is observed on flake margins, which may indicate direct use of unretouched flakes. Heavy-duty tools including two handaxes and a pick share similar technological features with tools in the Acheulean techno-complex. Preliminary OSL dating indicates that the occupation was no younger than 89 ka. The discovery and excavation of this Locality 1 further extends the history of humans’ activities in the Chengdu Plain, and sheds important light for our understanding of subsistence strategies and Paleolithic culture of early hominins in the region.