中文摘要：

本文对距今约7000年前的新石器时代姜家梁遗址人骨的下颌第一臼齿磨耗进行了研究。发现其磨耗度大于现代华北地区人类，提示这个时期食物可能较现代人坚硬。姜家梁第一臼齿磨耗度性别差异不显著，而狩猎一采集人群一般牙齿磨耗存在性别差异，由此推测姜家梁人群已经渡过狩猎一采集阶段，进入农业经济为主的生活。

英文摘要：

In this paper, tooth wear of M1 from Jiangjialiang is studied. The result indicates that tooth wear of Jiangjialiang is more obvious than modern human, which may indicate that food 7000 years ago is much rougher. There is no big difference in Jiangjialiang tooth wear between male and female, which may indicate agriculture play a leading role in Jiangjiatiang human life.