中文摘要：

稳定同位素分析技术近年来发展为复原古代民族食物结构、社会经济模式的有效手段。本文在应用该技术对庙子沟新石器时代遗址出土人骨中的C、N同位素比值进行了测定。结果显示，庙子沟新石器时代居民日常饮食习惯中保持着相当比例的动物性食物摄入，植物类食物的摄人中以C4类植物为主。结合其他相关资料，我们认为该组居民是以农业生产方式为主，狩猎业、采集业和渔猎业在经济生活中占据重要地位。本文的研究结果可以为复原新石器时代北方农牧交错带居民的经济模式研究提供有益的线索。

英文摘要：

The Miaozigou site a very important Neolithic cultural site is located on the southern hillside of Miaozigou village, Uraharura township, Qahar Youyi Qianqi, Inner Mongolia. In this study, we examine Miaozigou human paleodiet using stable isotopic ratios of carbon and nitrogen in bone collagen. Nitrogen isotopic ratios show that the ancient inhabitants of Miaozigou ate both animal and plant products. Carbon isotope ratios show that most plant products came from C, plants. It is significant to note that the economy of the Miaozigou site is mainly agriculture with a considerable component of hunting and animal breeding.