沂南地处山东省东南部、沂蒙山区腹地。境内河流纵横,丘陵低山广泛分布,沿河两岸谷地早在新石器时代就已经有先民在此繁衍生息。此地在春秋时期是阳国的疆域,阳都故城即位于今县城南18公里处。战国时属齐地,两汉时则分属城阳国和琅琊郡,并且一直是经济文化比较发达的地区。 Yinan is located in southeastern Shandong Province, Yimeng mountain hinterland. The territory of the vertical and horizontal rivers, hills and hills are widely distributed, valley along the river as early as in the Neolithic ancestors have lived in this multiplication. Here in the Spring and Autumn Period is the Yangguo territory, Yangdu Gucheng that is located 18 kilometers south of this county. When the Warring States Period is Qi, Han dynasty when it belongs to the city of Yangguo and Langya County, and has been more economically and culturally developed areas.