地处江汉平原西端，沮漳河流域西侧，位于宜昌、当阳、枝江、荆州交界处的冲积平原地带。南北约1600水Ⅲ东西约1400米，叠压在新石器时代晚期遗存之上。现存夯土南城垣残长86米，底宽13。4米，残高1。4米。趴壕距城垣10～34米，长86米，宽9．8米，深1米。一号台基位于城址北部，曾出土“秦王卑命竟坪王之定敉凑戎”铜钟和大型青铜构件及绳纹筒瓦、板瓦。
Located at the west end of Jianghan Plain and the west side of Juzhang River Basin, it is located in the alluvial plain zone at the junction of Yichang, Dangyang, Zhijiang and Jingzhou. About 1600 meters north and south, about 1400 meters east and west of Shuiiiii, superimposed on the remains of the late Neolithic Age. The existing rammed earth South City placanticline is 86 meters long and 13 meters wide. Four meters, residual height 1. Four meters. The trench is 10-34 meters from the city wall, 86 meters long, 9.8 meters wide and 1 meter deep. Platform No. 1 is located in the northern part of the city site. It has unearthed a copper bell and large bronze components, as well as rope-lined cylinder tiles and plate tiles.
城北杨家山子遗址发掘出新石器时代晚期地层和东周地！去的叠压关系，发现有东周时期房基、制陶作坊、窖穴和墓葬。该城址对于探索楚文化渊源及鄂西地区原始文化的发舣序列具有重要意义。2001年公布为全国重点文物保护单位。
The late Neolithic strata and the eastern Zhou Dynasty were excavated at the Yangjiashanzi site in the north of the city. The overlapping relationship between the two dynasties revealed that there were roof foundations, pottery workshops, cellars and tombs in the Eastern Zhou Dynasty. The site is of great significance for exploring the origin of Chu culture and the origin sequence of primitive culture in Western Hubei. In 2001, it was declared as a national key cultural relic protection unit.