一、前言凹刃凿形器是南中国地区先秦时期一种特殊的器物,其最大的特征就是平面形状呈凿状,一面较平,而另一面则向外凸起,横剖面多呈半圆形或接近半圆形;单面刃,刃部凹曲呈弧形,其中单面凹刃是其最基本特征。从地理单元上而言,目前此类器物主要分布于南中国的成都平原、桂西南、滇东南、黔西南地区,以及越南北部地区的新石器和商周时期遗址中,其他区域目前尚未见到此类器物出土的报告。凹刃凿形器的形制不同于以往所见的凿形器,弧刃凹曲的特征是其与平刃或斜刃凿形器相比最大的差异性, I. Introduction The concave edge chisel is a special kind of artifact in the Pre-Qin period in southern China. The biggest feature of the concave edge chisel is that it is chisel-shaped in plane shape, flat on one side and convex outward on the other side. Shaped or nearly semicircular; single-sided blade, curved concave curved blade, of which one-sided concave is its most basic features. Geographically speaking, at present, such artifacts are mainly distributed in Chengdu Plain of South China, in the areas of Nei Gui Southwest, Southeast Yunnan, Qianxinan and Neolithic and Shang and Zhou Dynasties sites in northern Vietnam, and have not yet been seen in other areas Report of unearthed such artifacts. The shape of the concave chisel is different from the chisel seen in the past. The concave curvature of the arc edge is characterized by its greatest difference compared with the flat blade or chamfered edge chisel,