Abstract: In this research, carbon and nitrogen stable isotopes in human bones dating from the Spring and Autumn periods were analyzed from the Sunjianantou site, Fengxiang, Shaanxi Province. All samples were well preserved and could be clearly used as dietary indicators. During these periods, the ancient Qin peoples' diet mainly relied on C4 plants and some meat, based on the comprehensive analysis of δ13C and δ15N values. From this analysis, we suggest that the substance strategy was a mixture of agriculture and herding. According to the comparative analysis of δ13C and δ15 N values, the human as funerary objects probably represent concubines or attendants whose diet was similar to their owners. Obviously the diet of Qin ancestors was stable from Spring and Autumn period through to the Warring States period, and any change in the proportions of C4 and value of δ15 N were related to the historical transition of the society.

Key words: Qin tomb of sunjianantou site; Carbon and nitrogen stable isotopes; Dietary; Human as funerary objects